Check out engineering marvels of the past at this unintentionally retrofuturist museum.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

These cascading falls resonate throughout the Bulgarian forest.

An extraordinary museum devoted to the pop art legend created by Slovak artists.

Climb around the high waterfalls on series of iron ladders and bridges within the wildest gorge in the Slovak Paradise.

The former home of Dutch anthropologist Bert Flint now houses a collection of Berber art and artifacts.

In this desolate valley resides a gorgeous set of rocks sporting a technicolor design.

Trash-filled shrines to an unofficial saint known for her endless breast milk dot the highways of Argentina.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

Thanks to the building of a life-giving reservoir, part of the Great Wall of China is now a dive site.

The field of tiny caves that mark this Chinese cliffside are each their own historic Buddhist temple.

A progressive LGBTQ hub offers dancing, HIV testing, art, and more.

This terrifying glass bridge on the side of a mountain cracks as you step on it.