The Thames Barrier is one of the largest movable flood barriers in the world. It protects 125 square kilometres of central London, including 375,000 properties, offices, power supplies, tube lines and hospitals as well as historic buildings such as the houses of parliament.
The Thames Barrier is one of the most impressive famous landmarks in London and has closed more than 175 times to protect London from flooding.
Thames Barrier is now offering group talks, complete with afternoon tea. Full details and booking form are below.
Photo by DAVID ILIFF. License: CC-BY-SA 3.0