The monument honors the mountaineers who were part of Europe’s best anti-Nazi forces.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

An otherworldly alpine pasture with its own unique microculture that recalls Middle Earth.

A miniature train-ride through Slovenia's largest cave system.

This one-time health resort was used by aristocrats around the world.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

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

The interior of this Serbian royal family's mausoleum is covered with exquisite mosaics.

Thousands of abandoned statues of deities are taken to this hillside in southern Hong Kong.

A pair of trees near a Hong Kong shrine are said to grant wishes, but only the ones they hold on to.

Climb to the top of the world's largest seated bronze Buddha.

In Hong Kong, a fairytale flower tunnel is hidden within the gardens of a public housing complex.

This hulking behemoth is actually five interconnected towers built in the 1960s.

This abandoned Slovenian military barracks has become a punky-political art squat.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

The legendary building that needed ghostly approval before being built.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

A unique underground structure dating back to the 1st century BC.

This ancient theater was once the home of fierce gladiatorial battles.

Walk through living pictures and music in the Cathedral of Images.

The Nobel-Prize-winning author of The Stranger is buried beneath a simple gravestone in a sleepy French village.

A public park off the beaten path with a beautiful waterfall and 13th century Cistercian abbey.