City of 118 small islands built on wooden piles in a saltwater lagoon, defining canal-and-bridge urbanism. Inscribed 1987.
From Wikipedia
The Venetian Lagoon, also Venice Lagoon or Lagoon of Venice, is an enclosed bay of the Adriatic Sea, in northern Italy, in which the city of Venice is situated. Its name, from a Venetian derivative of Latin lacus 'lake', has become the generalized English term for any enclosed, shallow embayment of salt water – a lagoon.