Mexico
The Aztecs fed their great floating city from artificial islands built on the edge of the lake. The last vestiges of this system are at Xochimilco in the far south of the city. You can take boats called trajineras around the islands, either following a peaceful and green route or join the crowds and the cacophony up and down the main drag.
Light railway from metro Tasquena to Xochimilco, then taxi.
Send your feedback or queries to been.there@guardian.co.uk
Search Been there
Your tips about Mexico City