Hidden deep within the mountains, this abandoned WWII air raid shelter has taken on a strange new identity. Accessible only through a narrow opening in the rock, the cavernous space has become a ...

A sprawling network of secret underground tunnels is being transformed into a major new London tourist attraction. Hidden 40m below the streets of the capital, the Kingsway Exchange Tunnels were built ...

Air-raid siren sounds the warning ... In London many people crowded into tube stations and spent the raid underground. Often daily life would continue within the larger shelters - for example ...

Finland's underground facilities, which can double as bomb shelters, have emerged as an inspiring approach as Europe ramps up ...