Duga 'Russian Woodpecker' Radar

Reachable only by foot, the ruins of the 1800s pump house and dam that supplied water to Durham, North Carolina, until 1927 sit by the scenic Eno River.

When the water level in the Danube in central Budapest is low enough, there is a secret site telling the history of one of the most iconic bridges of the city.

One of the world’s few undersea pedestrian tunnels connects Honshu and Kyushu islands.

A seven-story circular concrete tower, once the heart of Ferrara’s Eridania distillery, resembles a modern industrial Colosseum.

A monorail that was built to serve a new development but technical problems, lack of users, and a pandemic caused it to be closed and abandoned.

Raised catwalk walk through the trees alongside a river starting from an abandoned and colorful pumping station.

Once a vital asset for Southeast Alaska’s timber industry and the backdrop for the gritty 1954 film noir classic Cry Vengeance, the Connell Lake dam now stands as a tragic yet scenic barrier blocking vital fish passage.

Abandoned and overgrown town with views of the Mediterranean Sea.