In London, take a walk through the Greenwich Foot Tunnel

In a brilliant piece of foresight, Greenwich Hospital bought Island Gardens, on the other side of the Thames, in 1849 to prevent anticipated industrial expansion and preserve the view back toward Greenwich. Take the stone spiral steps down into Greenwich Foot Tunnel and head under the Thames (enjoy the echo during the foreboding walk) to Island Gardens, at the southern tip of the Isle of Dogs, for a magnificent view back over the river, of the Old Royal Naval College and Queen's House, framed by the park.

View Greenwich Foot Tunnel in Google Maps

From the Forums: Therese's Spring Break in London

"We walked under the Thames via the Greenwich Foot Tunnel. The kids found this memorable for several reasons. The first was the large number of cyclists riding in the tunnel, despite it being very clearly marked as prohibited. The second was the elevator at the far end that brought us back up to street level. It was the elevator that fascinated, but the fact that it was manned by an operator. The idea of an operator was just entirely foreign to them, and the fact that he was at liberty to play recorded pop music was even more fascinating." (more)