Dover in the United Kingdom
The underground structures found in Dover in England may not be as impressive as some of the cities on our list, but the structure itself has a curious history to share with the world. Nestled below a prominent castle in the region, this structure was primarily used by the Royal Army Medical Corps in World War II. Over and above this, it also played an important role during the Dunkirk evacuation, which saw allied soldiers depart from the beaches and harbor in the area between 26 May and 4 June in 1940. History aside, it contains some exquisitely crafted steps and crevices too.
Dover In The United Kingdom
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