The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

A beautiful 62-acre Catholic shrine and botanical garden.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

A beautiful geyser under environmental threat.

Home to items never before seen by the public.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The first declared National Monument in the United States.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Eighteen miniature death-scene dioramas.

The seamy, underground secrets of Portland's criminal past.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.