According to the Tallinn City Museum, the full tunnel network stretches about 1.3km (0.8 miles), though not all sections are connected or accessible.

LONDON (AP) — There is a history-rich part of London that few people have seen, where the city braced for the Blitz, James Bond’s creator got inspiration and secret Cold War messages passed ...

The tunnels lie directly below London Underground’s Central Line in the city’s Holborn area. Work to dig them began in secret in 1940, when Britain feared invasion by Nazi Germany.

It’s a rare look at a vital part of St. Louis that you rarely get to see, the 10 thousand mile maze of sewers below the city.

The City Museum is a favorite destination for tourists who marvel at its model railroad, historic artifacts, winding network of tunnels and caves, stingray feedings at the World Aquarium, Circus ...

The tunnels lie directly below London Underground’s Central Line in the city’s Holborn area. Work to dig them began in secret in 1940, when Britain feared invasion by Nazi Germany.

A long-secret network of tunnels 100 feet below the streets of London could be the city’s next big tourist destination ...