In this historic region, homes and churches are carved into ancient volcanic rock formations.

The final resting place of New Orleans' most famous voodoo priestess.

A 140-year-old castle with underground caves hidden in San Francisco.

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

The largest earthwork effigy in the world.

The first declared National Monument in the United States.

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

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

Odd outsider art installations surround a Gold Rush-era ghost town.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

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

A modest park memorial pays tribute to one of the Titanic's most revered storylines.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

A giant Troll lurks under one of Seattle's oldest bridges.

A walk through the historic city center, under the streets of Seattle.

The strange behavior of a tween led to allegations of witchcraft and a curse being placed on anybody within earshot.

This recreation of a 19th-century dime museum is full of oddities.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

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