the 15th anniversary of the spectacular nuit blanche. lights gets even brighter as artists and performers light up paris with free events from sunset to sunrise for one night only. the festival takes over the whole city. i have come down to the river seine for a behind—the—scenes look at rehearsals for one of this year's most eye—catching installations. the theme of the event is ‘working together‘. and it is all about getting parisians and tourists alike involved in the art. when it is up and running, this giant installation, the maree de lettres, or tide of letters will give visitors a chance to send a message across the city. altogether we have 42 letters because it is a bit nerdy — 42 is the answer to everything. people have an app and there they can see a list of topics. for each hour of the night, from 7pm until 7am we have a single topic and people can make suggestions according to this topic. the suggestion with the most votes wins. and moving these giant letters takes quite a knack, as i discovered when i tried to movejust one. i

the number of people going to nuit blanche is just crazy.know? you can feel it. so you have on one side walking and contemplating the city and on the other side you have the artistic project. i think this is why nuit blanche is so famous. and it certainly seems to have worked. there are over 150 events on throughout the night and every venue we went to was packed. the most popular events are the ones that are more immersive. i enjoyed this quite serene exhibition about european rail travel. it is a soundscape that has been composed to evoke the history of rail. and with the smoke and the dark garden, it is quite atmospheric. the whole of paris seems to come togetherfor this event with restaurants, bars and public transport staying open through the night for those in it for the long haul. if you are hardy you can party until7am. but i am not quite able to make it that far. it is past iam. and this party is showing no signs of letting up. but it is the end of this week's travel show and coming up next week... henry's in australia's red centre

the number of people going to nuit blanche is just crazy, we are talking about 800,000 people, you knowwe are on the road with a backpacker who has clocked up more than 120 countries on his travels and has done all that without being able to see. my name is tony giles, i am from england, i am totally blind and severely deaf in both ears and i travel around the world, trying to visit every country. previously wejoined him as he explored jerusalem. massive blocks. very smooth. but today he heads into palestinian territories to make his way to the holy town of bethlehem. i am now at the checkpoint betweenjerusalem and bethlehem. i‘ve got to across the checkpoint and go past the dividing wall. railing... getting through the checkpoint is a little bit complicated. slightly more complicated and confusing than i thought. and then sort of trying to follow other people and people pushing me from one way to the other. i would say we are in the palestinian side, the palestinian territories. it is quite exhilarating. as you come out the tunnel into the taxi area, where the wall is, you can hear all