The only microgravity tower in Europe can produce nine seconds of weightlessness.

Constantly maintained, this organ is playing a six-century long composition by John Cage.

This renaissance château was home to an infamous witch hunter who sent a hundred suspected witches to their deaths.

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

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

This doorless 20th-century elevator doesn't stop or slow down.

An Orwellian sculpture with eyeball cameras watches passersby.

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

Two monstrous faces loom over a village in Czechia.

Rising from the sea like a stone monster.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A submerged archeological park still holds the wonders of a Roman Sodom.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

A 16th-century horror show built in a lovely Italian garden.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.