This maze-like slot canyon is a unique gem within an already fascinating geological area.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

The summer home of the largest colony of bats in the world.

A collection of Witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

Medical history museum featuring a lovely doctor's office from the 1800s.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

The angel of death appears to weep black tears at this grave marker.

Stroll through a wonderland of stupendous moss-covered trees.

A toxic ghost town sitting atop a massive coal fire.

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

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Try not to get slimed in Tribeca.

Medicinal spa created with the discharge from a geothermal energy plant.

A crumbling hospital from the 1850s on Roosevelt Island.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

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

An abandoned 1920s school with a mysterious history.

On the Oregon coast there is a natural hole that seems to be draining the sea.

400-year-old garden, restored to beauty.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

The farming museum contains an extensive taxidermy collection, including the world's largest stuffed horse.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

This tiny man looms large over downtown Charleston.

Yo, Adrian!