In the hinterlands of Serbia's capital, a giant reflective mushroom houses an aeronautical history of the former Yugoslav republic.

These pools have been abandoned for over 20 years.

During World War II, this rice mill became a Nazi concentration camp.

Europe's only Temple of Mithras located in a natural cave.

This overgrown mountain village has been abandoned for nearly a century.

With its mine closed, this old village is starting to resemble a ghost town.

The hilltop ruins of a border fortification in the Italian Alps that was much fought over.

A beautiful drive through the foot of the Alps traces the path of 15th-century Turkish raids.

A crumbling World War I fort that is reached through a series of concrete tunnels.

For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

The only gulag ever to exist in socialist Yugoslavia.

The remains of a sunken military ship wreck visible through clear water.

An unmistakable facial pareidolia in the Julian Alps also includes a fantastic tale.

Two planes stand abandoned after the closure of an aircraft-themed restaurant.