The 17-mile underwater tunnel used by high-speed trains will be as deep as 1,558 feet below sea level, according to the project planners.

The Greenwich Foot Tunnel, which links Cutty Sark Gardens to Island Gardens, opened in 1902 as a lifeline for workers heading to the shipyards and docks of East London. Before that, people relied on ...

While the tunnel’s history is fascinating, its modern-day purpose is just as valuable. Thousands of Londoners use it daily to dodge traffic, avoid costly train fares or simply enjoy the novelty ...