Venice, Italy is the world's most famous canal city—and for good reason. Built across 118 small islands in a Venetian Lagoon, connected by 400+ bridges, it has no cars, no roads, only canals. The Grand Canal (3.8 km, S-shaped) is the main artery, lined with palazzi showcasing Gothic, Renaissance, and Baroque grandeur: the Doge's Palace, Ca' d'Oro, Basilica di Santa Maria della Salute.
Venice faces existential threats: rising seas (acqua alta), subsidence, overtourism (25M+ visitors/year vs. 50k residents), and cruise ship erosion. The MOSE flood barrier system (operational 2020) offers partial protection. Sustainable tourism initiatives now encourage longer stays, off-season visits, and exploration beyond San Marco—to islands like Burano (lace), Murano (glass), Torcello (byzantine mosaics), and the quiet canals of Cannaregio and Castello where Venetians actually live.