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During World War II military efforts expanded the tunnel system first constructed during the late 1700s to create more space for the storage of equipment, ammunition, and food. The Royal Engineers and Canadian army headed the project by contracting four separate specialized tunneling companies. The network of tunnels was so large and complex that it virtually created an underground city, capable of housing 16,000 troops. Power generators, a water distillery, a hospital, a vehicle maintenance shop, a bakery, and a telephone exchange were all contained within the subterranean dwelling. Tours of the tunnels run daily and cost eight pounds per person.
Second World War Tunnels, Willis's Road, Gibraltar GX11 1AA, Gibraltar, Spain, Phone: +350-20-07-16-43
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