The Venetian Causeway crosses Biscayne Bay between Miami on the mainland and Miami Beach on a barrier island in south Florida. The man-made Venetian Islands and non-bridge portions of the causeway were created by materials which came from the dredging of the bay. The Venetian Causeway follows the original route of the Collins Bridge, a wooden 2.5 mi (4 km) long structure built in 1913 by John S. Collins and Carl G.