This abandoned limestone quarry now provides visitors with multiple, breathtaking viewpoints.

Although now a decaying ruin, this stone cabin's history includes several notable figures.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

Also known as the "Red Taj Mahal."

Once the largest public hospital for the mentally ill was also surrounded by controversy.

A secluded, little-known temple hidden amid the dense jungle.

This park in Nagarkot boasts one of the best views in all of Nepal.

This little brick tunnel built by Confederate forces was used to conduct surprise attacks on the railroad.

This tomb was fashioned with a sliding window for a grieving mother who struggled with her daughter's death.

Only a few signs remain of the buried Colorado mining town that supplied the uranium for the first atomic bomb.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

Abandoned medieval hill town.

A collection of objects supposedly singed by the hands of souls in purgatory.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

These two springs are tied to several legends, one of which involves the travels of Saint Olof.

This large, circular tomb is the final resting place of the first emperor of Rome.

This family cemetery is a reminder of a smallpox outbreak in late-19th-century Texas.

One of the oldest cemeteries in Germany was originally used for victims of a cholera epidemic.

This educational institution and reference library specialize in the psychic arts and mediumship.

This rare surviving broch is one of Scotland's most impressive Bronze Age structures.