A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

What was once an underground Nazi city is now Europe's largest bat reserve.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

This artificial cave looks like something out of a fairytale.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

Tiny communists hammer away on the Olomouc Astronomical Clock.

Massive installation of Europe's negative stereotypes.

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

Crammed inside this grounded passenger plane is a bar that was once a Communist hang out and is now a ratty relic.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

Unique house covered in a nightmarish mural of demons, ghosts and monsters.

A spiral staircase twists to the top of this unusual Czech lookout tower.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

This network of conjoined cellars was riddled with traps and supposedly allowed the townspeople to pretend their homes were deserted.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

The hidden lair of an alchemist rediscovered in a 2002 flood.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

Bohemian paradise covered in majestic forests.

Two monstrous faces loom over a village in Czechia.

A church of bones, decorated with 40,000 human skeletons.

Europe's second largest ossuary wasn't discovered until 2001.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.