Xochimilco's canal network stretches across ninety miles of pre-Hispanic waterways, the last surviving fragment of the vast lake system that once fed Tenochtitlán. The trajineras — flat-bottomed wooden boats painted in jewel tones and arched with flower garlands — were built not for tourism but for chinampas agriculture, ferrying corn and squash from the floating gardens that still line the narrower channels. UNESCO inscribed the site in 1987, citing both the hydraulic engineering of the Mexica people and the unbroken continuity of cultivation methods dating to the fourteenth century. The word xochimilco derives from Nahuatl: xōchitl (flower) and mīlli (cultivated field), a name that captures the economic logic of a district that once supplied the Aztec capital with produce and ornamental blooms. Today the canals serve a dual function. On weekdays, farmers still pole trajineras laden with cempasúchil marigolds and gladioli toward the wholesale market at Cuemanco. On weekends, the main waterways transform into floating carnivals. Families rent trajineras for hours-long drifts, hiring mariachi bands and marimba troupes who navigate alongside in their own boats, playing requests for a fixed fee per song. Vendors in smaller canoes sell elote, micheladas, and woven palm hats, pulling up to moving trajineras to complete transactions on the water. The party-boat tradition gained momentum in the nineteen-seventies, when middle-class chilangos began commissioning all-day rentals complete with portable sound systems and coolers of beer. By the two-thousands, the canal district had become synonymous with weekend revelry, a reputation that both sustains the local economy and complicates conservation efforts. The ecological tension is visible in the canals themselves. Invasive water hyacinth chokes stretches of open water, a legacy of nutrient runoff from urban expansion. The axolotl, a critically endangered salamander endemic to Xochimilco, survives only in isolated refuge zones maintained by biologists and volunteer monitors. Efforts to balance tourism revenue with habitat restoration have produced a patchwork of designated quiet zones and high-traffic corridors. The trajinera cooperatives — most operate under family licenses passed down through generations — now participate in canal-cleanup campaigns and limit engine use in sensitive areas. For visitors, the experience remains one of sensory abundance: the slap of pole against water, the scent of charcoal from floating taco grills, the call-and-response of competing sound systems, and the improbable sight of a centuries-old agricultural landscape repurposed as a floating dance floor.