This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

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

The only gulag ever to exist in socialist Yugoslavia.

Nicknamed Kazakhstan's Grand Canyon, this natural wonder lies east of Almaty near the Chinese border.

A fortified city, home to a remaining population of five families

Extremely isolated Silk Road caravanserai in the middle of nowhere.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

These warring psychedelic crags commemorate an unsuccessful military operation.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

This huge metal monument is slowly being stripped to its concrete skeleton.

An ethereal glowing blue ocean cave in Croatia.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

Once thought to be the Garden of Eden it holds a holy footprint claimed to belong to Adam, Buddha and Shiva.

This elaborate temple was built around one of the Buddha's teeth.

An ancient stone fortress considered by many to be the eighth wonder of the world.