stretches 180 kilometres and these days the whole district, and these days, the whole district of xochimilcoesco world heritage site, but one that could do with a bit of a clean—up. we sent eva zu beck there to find out why. check out all these amazing boats, they're so colourful. these are called trajineras. i was honestly expecting to go on a quiet little boat ride, but this place is a realfiesta. we're stuck in a trafficjam of like ten different boats, tourist boats, shop boats. the moment you leave behind the super busy embarcaderos of xochimilco, it feels like you enter a completely different world. there's so much wildlife here, so much greenery. it's just so serene. but even out here in the more remote areas of the wetlands, the pollution is endangering one of mexico's most iconic animals — the strange—looking but much—loved axolotl. what's so special about these little creatures? i can't believe this is happening. oh, my god, it's so smooth! i'm a i'm a box —— about to hold it! it's so lovely, it's like holding a baby! the axolotl is not only endemic to mexico. its population is limi