Lynnewood Hall
Built in the 1800s in Elkins Park, Pennsylvania, Lynnewood Hall was built in three years. Full of grandiose details, it was owned by Peter A.B. Widener, who used his Gilded Age mansions for lavish parties. After he died, the mansion was abandoned, and in 1952, the Faith Theological Seminary bought it for $192,000.
Mys Aniva Lighthouse
Located on Russian Island Sakhalin, the Mys Aniva Lighthouse was built by the Japanese military in 1939 but has since been completely abandoned. It was uninhabited until Russia wanted to begin annexation. The island is located between the Sea of Okhotsk and the Sea of Japan. There is still a 662 pound pool of mercury inside of it.