Venice known as the City of Canals and the Floating city is also known as the city of bridges. Of the four oldest bridges spanning the Grand Canal is The Rialto Bridge.
Venice has over 400 bridges which are necessary to walk across several waterways. The transport in Venice is water buses and most is done walking. Venice is made up of islands and these bridges connect those islands.
Venice has several attractions including the Gondola ride which I avoided looking at the dirty water.
This link has the list of some prominent bridges
Have you been to Venice, Italy?