Local legends say that fairies used to dance in the moonlight here and invite handsome young men into their grottoes.

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.

Marvel at the excessive luxury of the ousted Ukrainian president's former estate.

The first skyscraper to include a Ferris wheel built into the facade.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

The bones of an old zoo crumbling in the shadow of a new one.

Abandoned concert venue legendary for its rock counterculture.

What was once the largest NFL stadium.

This "Palace of Purification" has made many film appearances as a dark and sinister headquarters.

This extensive nuclear fallout shelter built from 42 school buses could house 500 people in its tunnels.

A Canadian POW for German soldiers during WWII where prisoners hatched an elaborate escape plan.

Legend says that this short Canadian tunnel still holds the dying screams of a girl who burned alive.

This colorful creation wasn't always a welcome part of Toronto's Moccasin Trail Park.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

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

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

This is what trains will look like after the zombie apocalypse.

Located in the house where Gustave Flaubert was born, this odd museum has more to do with medical grotesquery than the Western novel.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Stone carvings record the Norse myth of Sigurd, providing a glimpse into Scandinavia's transition from paganism to Christianity.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.