The Postal Museum, which opens today, gives visitors access to an underground rail trail that once delivered mail throughout the city.

Twenty-five meters below London’s busy streets lies the British Post Office’s underground railway network – a hidden architectural gem laying dormant, but which may soon run again.

A passenger train rides through the Mail Rail tunnels that is included in the Postal Museum in London, Wednesday, July 26, 2017. London's newest tourist attraction is perfect for underground ...

Mail Rail is located in London's Clerkenwell neighborhood across the street from the renovated an expanded Postal Museum. Admission to the museum and a ride on the railway is £11 (about $14.50 or ...

The Postal Museum: It scratches a childhood itch for secret, Narnia-like passageways - Claudia Cockerell delves into a hidden gem in Clerkenwell and emerges nostalgic for the dying art of letter ...

LONDON (AP) — London's newest tourist attraction is perfect for underground explorers. It's not ideal for the claustrophobic. A visit to Mail Rail , a subterranean train network that once ...