Pedestrian tunnel under the Thames designed by Sir Alexander Binnie, linking Greenwich town centre in the south with Island Gardens Park in the north. It is 1,215 feet (370.2 m) long and 50 feet (15.2 m) deep. The tunnel is classed as a public highway and by law is kept open 24 hours a day. It is accessible by spiral staircases and large lifts.
Credit for this entry to: Alan Patient of www.plaquesoflondon.co.uk