Xochimilco's 170 kilometers of canals are the last surviving remnants of a vast Aztec lake system that once covered the Valley of Mexico. In the 14th century, the Mexica people engineered chinampas — artificial island gardens built from lake mud and anchored with willow roots — to feed Tenochtitlan's growing population. These floating gardens transformed shallow wetlands into one of the most productive agricultural zones in Mesoamerica. Today, only five percent of the original chinampa network remains, protected under UNESCO World Heritage status since 1987. The brightly painted trajineras that navigate these waterways carry a cultural lineage that predates the Spanish conquest. Each flat-bottomed boat, propelled by a single boatman wielding a long pole, can carry up to twenty passengers beneath its fabric canopy. The tradition of decorating prows with family names and floral arches dates to the early 20th century, when Xochimilco became a weekend retreat for Mexico City families seeking relief from urban sprawl. Mariachi bands drift between boats, hired by the hour to serenade passengers navigating the narrow channels. Visitors today encounter an ecosystem under pressure. Introduced carp and tilapia threaten native axolotl populations, once abundant in these canals. The remaining chinampas still yield flowers, vegetables, and herbs, sold at the nearby Mercado de Xochimilco. Xochimilco boat tour tickets grant access to a landscape where agriculture, recreation, and conservation intersect. The canals open daily from 09:00 to 18:00, with entry to the pier area free; trajinera rental operates on an hourly rate negotiated directly at the embarcaderos. The Nativitas and Nuevo Nativitas piers see the heaviest traffic, while Cuemanco offers a quieter departure point favored by photographers. Weekend afternoons transform the waterways into a floating market. Vendors pole alongside trajineras selling elote, micheladas, and roasted plantains. The trajinera boat rental system remains informal — no advance reservation secures a specific vessel — but organized group tours now bundle canal passage with cultural stops in Coyoacán or tastings of pulque and mezcal. The experience reflects Xochimilco's dual identity: a working agricultural district and a heritage site navigating modern tourism demands.