The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A trash dump made beautiful by nature's power.

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

Haunting and beautiful trees, doomed to die.

The oldest lighthouse on America's west coast no longer needs keepers, yet they maintain the site anyhow.

The land is home to swimming ponies and a legendary 18th-century treasure.

What began as an art installation is now the private drinkhaüs for a brewery's employees.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

Giant granite rocks standing end-to-end like a train of circus elephants.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

"X" marks the spot of an echo chamber in the middle of a plaza.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

Ruins of a Carnegie family mansion on Cumberland Island.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Bizarre Cavern.

The world's longest known cave system.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

Symbolic attempt to overcome the issues of life.