London deep-level shelters

The London deep-level shelters are eight deep-level air-raid shelters that were built under London Underground stations during World War II.

Ten shelters were planned, but only eight were completed: The other two were to be at St. Paul's station on the Central line and Oval station on the Northern.
 * Chancery Lane station on the Central line and
 * Belsize Park,
 * Camden Town,
 * Goodge Street,
 * Stockwell,
 * Clapham North,
 * Clapham Common, and
 * Clapham South on the Northern line.

More information on the Wikipedia page.