The Nekoma Pyramid, North Dakota, USA
If you head to Nekoma, North Dakota, which has a population of 24 people, you’d see a futuristic-looking pyramid in the distance. The Nekoma Pyramid was built during the height of the Cold War to operate as a radar system and missile silo.
The government left the Nekoma Pyramid in the ’60s. Today, the base still stands in the middle of nowhere and is the subject of several conspiracy theories.