This mineral lake known for its healing powers is so buoyant it's been dubbed the "Dead Sea of Canada."

Local lore says two enemy dragons live within these breathtaking mountain lakes.

Legends of treasure and spirits flow from this this fairy tale-like oasis.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

All that's left of the quintessential "cabin in the woods."

A modernist landscape of water and sci-fi concrete.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

The world's longest known cave system.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

This geothermal hot spring hides beneath a slowly growing mineral dome.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Hollowed out cedar log tubs set in an ancient towering forest.

A strange house built only at night, with rumored mystic inspiration.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

The ghostly remains of an accidental sea.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

This naturally-sourced hot spring is now home to a clothing-optional resort.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.