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

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

This Roman monument is surrounded by more recent construction, offering a stark contrast between ancient architecture and the modern urban landscape.

An otherworldly alpine pasture in Slovenia with historical ties to WWII and architecture that recalls Middle Earth.

Strange rumors surround the artist who created these solemn metal guard dogs.

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

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

A whimsical bridge adorned with decorative dragons.

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

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This old wooden funicular railway leads to a cemetery in the forest.

This riverside restaurant has been serving customers since 1146.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Buddha shrines hide within dark tunnels at this unique forest temple.

You can walk up Thailand’s naturally non-slip waterfall.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

Morocco's Argania trees are infested with nut-hungry goats.

The forgotten remnants of a land-to-sea cable car that was once unique in the world.