There's 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 between Washington and Moscow. It's a network of tunnels 100 feet below the streets that was secret for decades, but which now could be the city's next big tourist destination. Local authorities have approved plans to fill the 90,000 square-foot site with an intelligence museum, an interactive World War II memorial, and one of the world's deepest underground bars, per the AP. "It's an amazing space," said Angus Murray, chief executive of the London Tunnels. "And I think it tells a wonderful story."
- Vast bomb shelter: 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. They were designed to shelter up to 8,000 people in a pair of parallel tunnels 16 1/2 feet wide and 1,300 feet long. The tunnels were never used for that purpose; by the time they were finished in 1942, the worst of the Blitz was over, and Underground bosses had opened up subway stations as air raid shelters for Londoners.