When you think of museums, you most likely think of ones with paintings and sculptures, but here are some suggestions for those of you who are interested in the history of war. And these museums are all underground.

Several locations in Europe have turned war bunkers into museums. The Kelvedon Hatch Secret Nuclear Bunker is the largest cold war bunker open to the public in southeast England.

It originally was designed for up to 600 military and civilians for the possible aftermath of a nuclear war.

If you want to see Northern Europe’s largest fortifications from the Second World War, visit Museums Center Hanstholm. During the war, it also housed one of the four giant 38 cm guns.

In Austria, the Bunker Museum of Carinthia was built during the Cold War. Here, you can see bunkered tank turrets and their main guns.

Looking for some offbeat travel adventures? How about Taking the Slow Boat: Freighter Trips, or Inside North Korea: the Real-Life 1984.

And if you’re really into tough travel, check out this excerpt from the Travel Detective Bible on the subject.

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