A large area (actually, a whole delegación) in the South of Mexico City, bordering with Tlalpan.
The center of Xochimilco is a major turist destination, because of the many square miles of canals, lakes and little vegetable-growing islands (called chinampas).

The tourist would be well advised to bargain brutally when contracting one of the punts, especially if said tourist looks pale and appetizingly gringo.

The easiest way to get to Xochimilco is with the metro ligero, which you catch in Taxqueña.