The Grand Canal is the largest channel in Venice, Italy, forming one of the major water-traffic corridors in the city. One end of the canal leads into the lagoon near the Santa Lucia railway station and the other end leads into the basin at San Marco; in between, it makes a large reverse-S shape through the central districts of Venice. It is 3.8 kilometres long, and 30 to 90 metres wide, with an average depth of 5 metres.