Marina Bay is a bay near Central Area in the southern part of Singapore, and lies to the east of the Downtown Core. The area surrounding the bay itself, also called Marina Bay, is a 360 hectare extension to the adjacent Central Business District.
In the 1970s, land reclamation was carried out at Marina Bay, forming what is today the Marina Centre and Marina South areas. In the reclamation process, Telok Ayer Basin and Inner Roads was removed from the map by reclaiming land, while the Singapore River's mouth now flows into the bay instead of directly into the sea. In 2008, Marina Barrage was built, converting the basin into a new downtown freshwater Marina Reservoir, providing water supply, flood control and a new lifestyle attraction.