Narrow gorges and deep pools created by long-ago glaciers.

Go surfing on this urban wave, "hacked" by local surfers.

These blingy, baubled skeletons lie in glass boxes inside a baroque Bavarian church.

The stones of this formerly witch-obsessed castle were used to build a church.

A beautiful gorge filled with streams and waterfalls.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

Where beer lovers can literally immerse themselves in beer.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

Romania's only crater lake with water as pure as if distilled.

This fortress-like monastery is covered with intricate frescoes.

A fortress built to pacify local uprising that had a stint as a Nazi concentration camp before becoming a five-star hotel.

One of the most valuable palace-garden complexes in the eastern borderlands—and one of the most haunted.

This attraction was abandoned after the Chernobyl disaster.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This derelict superstructure was a very important warning system for the Soviet military.

One of the largest remaining ancient burial mounds of the 10th century.

In the land of the Light Brigade stands a testament to the Cold War.

Over 300 wood sculptures depicting characters from Slavic, Greek and Western folk tales fill this magical garden.

The ancient ruins of an extinguished city amidst the bustle of a modern one.

A Turkish monastery tucked into a cliff wall.

An abused and forgotten metropolis, abandoned for centuries.

The oldest ruins at this castle overlooking Georgia's Terek River Valley date back to the 10th century.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.