In 1969, land reclamation work to create 360 hectares of prime waterfront site began at Marina Bay. The reclaimed land forms what is today the Marina Centre and Marina South areas, and the reclamation work was completed in 1992. 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 1988, the draft plan for Marina Bay was presented to the public in a two-week exhibition where it set out the objectives for the development, among which are optimising the waterfront location and creating a distinctive image with international landmarks that could become a focal point for the city.
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.
The Formula One Singapore Grand Prix has taken place annually since 2008 on a street circuit adjacent to Marina Bay. Since its construction in 2007, The Float@Marina Bay has hosted events such as the National Day Parade, New Year’s Eve Countdown and Singapore Fireworks Celebrations, and also serves as a spectator stand for the Singapore Grand Prix. Furthermore, it also played host to the Opening and Closing Ceremonies of the inaugural 2010 Summer Youth Olympics.
The area also hosts the annual i Light Marina Bay, a sustainable light art festival.
The event space next to Marina Bay Sands, known as The Lawn, hosted the first overseas and Singapore edition of ArtBox Bangkok on two separate weekends.