A failed attempt to control drifting sands yielded a gnarled sylvan wonderland.

This massive subterranean fissure is known as the "underground Grand Canyon."

This giant boulder is pinched over a 1000-meter abyss by two mountains.

Walk 2,300 feet above the ground on the "Troll's Tongue."

According to the locals, the sands of this secluded Norway beach are infused with gemstone particles.

A stunning silver lining to global warming's gloomy cloud.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

An abandoned monument remembering the "Pančevo Holocaust" now stands as a shadow of its former self.

A forgotten and crumbling Yugoslav monument to the victims of fascism.

Built as an anti-fascist tribute, this surreal Yugoslav memorial became an unwelcome symbol after the Croatian war for independence.

The bizarre rocks of Đavolja Varoš are the result of natural erosion.

Curious carved stones and bird-like wings are a symbol of Serbian resilience and freedom on the site of a WWII massacre.

Abstract monuments express sorrow and resilience at the site of a horrific massacre in Nazi-occupied Serbia.

This symbol of Yugoslav liberation decorated with 620 carved heads of mythical creatures is now a forlorn relic of another time.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

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

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

This surreal memorial/cemetery is a necropolis of crumbling stonework and puzzle-shaped headstones.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

This abandoned airplane hanger is said to have once been a top secret launch facility.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

These spooky and unusual stone formations create an underworldly landscape.