Greenwich Foot Tunnel South.

About

The Greenwich Foot Tunnel is a pedestrian tunnel running beneath the River Thames between Island Gardens on the Isle of Dogs and Cutty Sark Gardens in Greenwich, built in 1902. The 50-metre-deep tunnel is a fascinating piece of London engineering history and offers a free and unusual way to cross the river, giving walkers access between two of London's most historic and scenic riverfront areas. Lifts and stairs are available at both ends; open 24 hours.