The Thames Barrier started life as a proposal by the Greater London Council in 1965. London had suffered several major floods in its history, most recently in 1953 where major damage was caused- and it is said that people were able to row across Westminster Hall during one flood in 1236. The GLC decided that a preventative measure had to be taken and in 1974 work began on the Thames Barrier.

Completed in 1984 the Thames Barrier is over 1,700 feet in width with four 200 foot openings. When the gates are raised they stand 6 feet above the water level reached in 1953. The gates are usually opened once a month. The best view of the barrier is by boat- several of the Thames tours stop here.

Those who go and view the Thames Barrier should take time and visit the Visitors Centre. Here guests can view the exhibits about the history of the Thames and the devastating effects on the capital when this happens. There is also a detailed exhibition about the Barriers construction from concept to realisation. The Thames Barrier Visitors Centre is easily accessed from North Greenwich Underground station and regular boat trips leave from Greenwich and Westminster Pier.