this is bbc news. the headlines — the head of the world food programme has accused russia of having declared war on global food security. david beasley told business leaders at the world economic forum in switzerland that russia's blockade of ukraine's ports on the black sea threatened food supplies for 400 million people. a russian diplomat has resigned over his country's invasion of ukraine, calling it "bloody, witless and absolutely needless". boris bondarev, a counsellor at russia's mission to the united nations in geneva, said he's never been more ashamed of russia as when it sent its troops across the border. the leaders ofjapan, the united states, india and australia are meeting in tokyo. discussions among the group — known as the quad — are expected to include how to address china's growing power in the

indo—pacific region. now on bbc news, the travel show. this week, the team re—visits the cambodian temple complex of angkor wat, to see how the area's hoping to recover, now that borders have reopened. this week on the travel show — waiting for the backpackers�* return... we have beautiful temples and a lot of beautiful places around cambodia. so it is something that they should come and have a look in their lifetime. ..following my nose in amsterdam... oh, it's very — it's lovely! yeah! ..it smells likejust a really good air freshener! ..and we go inside the world's largest crystal cave.

hello and welcome to amsterdam, the famous city of canals. a little later, i'll be sniffing my way around town to find out about new efforts to create a catalogue of historic odours, and not all of them pleasant. but first... we're starting in cambodia, at the vast and ancient buddhist temple complex of angkor wat. it's the world's largest religious site, normally attracting around 2.5 million people every year. pre—pandemic, crowds would arrive early to see the sunrise and stay for days nearby siem reap, making it the most popular spot in the country. but since covid, an eerie silence has fallen over the area. at one point, footfall dropped by more than 99%.

as you could see around ourself, do we see any tourists? laughs. ifeel quite sad, you know. i miss those days that i brought people here. we've got to deal a lot with our life situation at the moment, so many people lostjobs. in may 2020, we went to angkor wat to see the impact for ourselves. two years later, we've returned to catch up with the people we met. the last two years has been very difficult for me because i totally lost myjob and ijust got nothing else to do, just like many other people who survive from tourist industry as well. yeah, it was something that we never encountered before in our whole life. it's hard to describe.

sometimes you just want to cry, you know, talking about the tough time that we had no job and no any support. i miss people who used to come to visit my country. yeah, i really miss the walking through the temple, my explanation to people, and also, the ways i try to make people happy. but angkor wat hasn't been totally deserted all that time.

important conservation work to protect the temples has continued. but angkor wat hasn't been totally deserted all that time. important conservation work to protect the temples has

continued. this is the psar chaa. it is the most well—known

market in the city where tourists would come for shopping, for woodcarving, t—shirt, silver, silk. yeah, normally, these stores are opening, but at the moment, every store is closed. they are excited and it's so happy to see tourists walking in the street, walking around the temple. even not enough to give jobs to people yet, but, yeah, when we see people coming, we, you know, have, like, a good sign. nice people, we have beautiful

temples and a lot of beautiful places around cambodia, so it is something that they should come and have a look in their lifetime. welcome back to the netherlands. this week, i'm in what's always been one of europe's busiest city destinations. oh, so many to choose from. amsterdam. when i travel, one of the first things i notice about a place tends to be the smells. and often, it's one of the strongest memories when i go home too, like the scent of a venetian canal or a middle eastern spice market. here in amsterdam, the smell i identify with this place tends to be these things — stroopwaffels. sort of cinnamon and caramel, you sort of get it in the air when you're travelling around the city. the best part of it is you get to eat them, too. mmm, it's good.

scientists say there's a link between smell, memory and emotion. and now, they're using that connection to enhance our travels. in fact, one group has started amassing a library of historical smells, in an attempt to bring them back to life. the plan is to use them in museums, and on walking tours. may i...may i come behind here? yeah, yeah, yeah, come, come, come! what an incredible place! yeah, isn't it wonderful? is this all original? it's more of a drug store, you might say, between grocery and the apothecary. the project's not based in amsterdam by accident. this city, inga argues, is a rich hunting ground for ancient pongs. so, i guess back then, amsterdam would have been quite a smelly place. absolutely! it was called �*the beautiful lady with the stinking breath' because of the canals,

which looked wonderful, but evaporated a foul stench of not only the sewer — the privies that were leaking into the canals and all the factories that were there, but also, of the cadavers of animals that ended up in the — in the canal. not all the dutch smells are bad, though. in fact, to ward off the whiffs, many of the nobility carried pomanders, a kind of perfumed ball. so, what we did is we tried to recreate a pomander smell from an old book of secret recipes. if you pump it, and then you canjust pump it in front of your nose and smell, and maybe use both of the nostrils, and then try to... oh, it's very — it's lovely! yes, that's right! it's like a really good air freshener! laughs. once these programmes are up and running, how might

i engage with that? well, for instance, if you would go to the museum ulm in germany, you could look at a painting, smell a smell and then re—think, what is it that i'm actually seeing? and all of a sudden, you might notice different elements in that painting. or in the summer in amsterdam, you can go on a smell walk yourself and have a smell kit that you bring, and then in front of certain locations, you can look at your iphone, smell, and learn more about that space that you're in. while sniffing around in the past is an important part of the project, they're also employing some of the most cutting edge technology available today. deep in the old hq of a former spice trade company lies the modern tech at the heart of this project. marika uses artificial intelligence to scan historical documents, on the lookout for forgotten fragrances. through this database,

everyone can access all this information we've gathered about smells from all these different sources. museum curators can use it if they're interested in adding smells to their exhibitions. we're working on an app so you can do a smell tour, so you can basically see what kind of smells could have been in yourarea. so, really, we want to make smells searchable. i see a collection of bottles over here, which is very exciting! are these some of the reinterpreted smells? these are reinterpreted smells for the ulm exhibition. it's going to be a guided tour. so, there will be several paintings that are paired with these smell creations. fantastic. so, i can see here we've got helena's gloves. helena's gloves! got the smell of someone�*s gloves? yes, the smell of someone�*s gloves. there's helena. i'll make helena full screen. so, helena was very rich,

as you can also see by her dress, and she's holding these gloves and they also have, like, this embroidery on it. these are leather gloves, and the tanning process wasn't as sophisticated as it is these days, so it would actually create some rather smelly leather, so people, if you were rich enough, you could perfume your gloves to sort of hide — mask the smell of the tanned leather. 0h! just move it around a bit. people used to use dried roses, that was a lot... definitely floral. ..very popular. frankincense and jasmine. some ambergris. but there might also be — i don't know if you can smell it — let me check — i've got it here as well. sometimes it's a bit hard to find. there might also be, like, a bit of friction in there, so some of that leather still kind of comes through sometimes. there is a... so it's notjust nice.

yeah, there's like a... there's a bit of a pong. laughs. there's, like, there's...there�*s a sort of like a gentle edge of a bit... bit animalistic as well. yeah, and what's really interesting is knowing the history, it smells like one smell masking another smell. yeah. but it's notjust a novelty. inga's keen to show me how the walking tours that are being planned can offer a whole new layer of historical detail. this is where the dutch east india company used to unload silks, spices, herbs and tobacco from all over the world. in the 17th century, there must have been a lot to smell. smell this scent that we also created. 0k. so, do i wave it? yeah, wave it under your nose. ooh! chuckles. maybe don't wave it too close! i mean, it's not great! it's not great, no! is that what the canal would've smelled like here?

there are, indeed, elements of, yeah, a polluted canal smell, so it has sulphur... it has a kind of bathroom smell, yeah. yes, excrement, urine components in there. but it's also, the sulphuric component also leads you from the water to the military might, to the gunpowder that was actually stored in this building. this is the headquarters — or used to be the headquarters — of the dutch admiralty, so they were the the military force that went with the east india company to actually enforce labour, to use — make use of all kinds of violence to get that luxury spice trade into the dutch republic. this isn'tjust a touristic novelty — time, money and expertise have been spent making these smells as accurate as possible. and if there's one thing

they've taught me, it's that the past was a pretty stinky place. well, do stick around because still to come on the travel show — watching them watching her mending the night watch in amsterdam's biggest museum. this structured treatment really has to be done now because if we would wait longer, we will really get unrepairable damage. and we go inside the world's biggest geode in the crystal caves of southern spain. so, don't go away. one of the reasons amsterdam has become so popular is its museums and galleries. there are loads, from the microbe centre — which i enjoyed a few years back — to the van gogh museum, one of the most popular in the world. but there's one place

i particularly want to see while i'm here. this is the rijksmuseum. it's the country's largest museum, and it's also home to one of the netherlands�* greatest art treasures. this — rembrandt�*s night watch. but, in fact, the painting isn't there on the wall — it's currently in there. rembrandt�*s biggest and most famous painting is being restored and as a visitor, you can watch the work being carried out. i've been given permission to get even closer. yes. it's crazy to see, like, the back of an old master. can you tell me what you're doing here with what looks like a very tiny iron? we want to get an as flat, even canvas as possible because that's necessary for the new stretching, so we won't get any problems in the future. we want to get everything as even as possible. so, what's the next

step after this? is it working? it looks very flat to me. yeah, it is working but, as you can see here, when we use this little light, you can still see all these... ah, yes — little wrinkles. yes, all these little wrinkles. so, that's what we try to get out with the last step. this structured treatment really has to be done now because if we would wait longer, we will really get unrepairable damage on the painting, so that's why we are treating the painting at the moment. what's it like for you to work, surrounded by people? yeah, sometimes it's difficult — especially when the table is very close to the glass and you really feel like people are standing next to you, you know, and they're making so many photographs and movies, so, but i try to just not look at the public and just focus on the painting. and if you're worried that all you'd see is the back of the painting, you'll be happy to know that the night watch is now standing upright and visible again while ige and her colleagues continue their work in the museum's glass house.

and we're going to finish this week inside a natural wonder underneath southern spain. the pulpi geode is possibly the largest crystal cave ever discovered. it was literally unearthed 20 years ago and only opened to the public a few months before the first lockdown, and we've been to take a look.

well, that's all we have time for on this week's show, but coming up next week, rajan�*s in belfast... wow. ..scoring a night in the bed of northern ireland's most famous footballer. well, he was the fifth beatle, he was the coolest guy around and he was just an amazing footballer. and if you'd like to catch up on some of our recent adventures, you can find us on bbc iplayer. and don't forget, we're on social media, too — you can just search for bbc travel show and look out for the blue icon. until next time, from me and all the rest of the travel show team here in amsterdam, it's goodbye.

hello. after a wet night across parts of england and wales, keep the umbrellas handy wherever you are during tuesday. there will be some sunny spells. it won't be wet all the time, but you may never be too far away from a shower that could be heavy, possibly thundery. now, low pressure is beginning to edge away. we have a flow of air coming in from the west—northwest to the uk. it is unstable, so along with those sunny spells, there will be some big clouds building at times with those showers breaking out. away from central, southeast and eastern england, where it could still be quite wet first thing, quite a bit of dry weather early on, probably chillest across western scotland, a few spots in low single figures. just wait for the showers to break out. after the rain's cleared away from the eastern side of england, hints of brightness, and then the showers break out here as well, so you can see them coming through. they will be accompanied by gusty winds. as mentioned earlier, it doesn't mean it's going to be raining all the time, we mayjust have a brief shower and then a lengthy dry

and bright spell afterwards. temperatures i2 celsius in stornoway, 18 celsius in london. most around 14—17 celsius, not too far from average for the time of year, perhaps a little bit below. a lot of dry weather to end the day as the showers fade away, but then overnight and into wednesday, from west then pushing eastwards, there will be some cloud and outbreaks of rain, which means as wednesday begins, the lower temperatures mid single figures in a few spots where you have the clearer skies across the eastern side of england. so, this latest batch of wet weather will push on through, mainly during wednesday morning, not much rain, though, into the early afternoon into east anglia and southeast england, whereas elsewhere, it brightens up again, and it will be another afternoon of sunshine and scattered showers. temperatures pretty similar. wednesday is going to be a windier day, some gusts in excess of a0 mph, parts of scotland, northern england, perhaps the south coast of england as well. now, high pressure trying to build in for thursday, not having much success, as another weather front snakes its way in from the atlantic. it does mean there will be quite a bit of cloud around on thursday, some outbreaks of rain pushing in, some heavy showers in northern scotland. ahead of the system towards the southeast, although expected to cloud over, we mayjust see a few sunny spells, enough to lift temperatures back in a few

spots into the low 20s, whereas elsewhere, it's as you were. now, high pressure does move in friday, and at least into the start of the weekend, settling things down. although it is high pressure, though, that will not translate into warmth.

this is bbc news. our top stories — a warning from the un — russia's blockade of ukraine could push tens of millions into severe hunger. democracies versus autocracies — the leaders of australia, us, japan and india reaffirm their common intrests in the indo—pacific region, aiming to counter china's influence. rescue workers in iran search for dozens of people still trapped in the rubble of a collapsed high—rise building. and new calls for british prime minister borisjohnson to resign as more photos emerge of lockdown gatherings at downing street.