15) Aniva Lighthouse, Russia
Built in 1939, the abandoned Aniva Island lighthouse is thought to be radioactive. It has a long history with both Russia and Japan. Both countries actually traded ownership of the land. They even shared ownership at one point. The Soviets finally took full control after WWII and added radioactivity to the lighthouse. The lighthouse was operated by nuclear generators and mercury lubricants. The area was left abandoned after the fall of the Soviet Union.
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