This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

A 19th-century Baja cantina that many say is the birthplace of the margarita.

Canyon walls shrouded in ferns.

This natural marble cave is one of only five national monuments in Oregon.

The world's last remaining store of its kind.

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

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

Towering basalt columns, a creation of fire and ice.

This tiny cluster of abandoned buildings looks like the future of the ghost town - today!

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

An enchanting tunnel of cypress trees leads to an old morse code station still used today.

'Cause the fence start shaking, the earth was quaking.

This abandoned boat was left in place thanks to its rotting beauty.

Where a staggering 747 ships were constructed during World War II.

A sparse, solitary sequoia still stands as a living tribute to the famous conservationist who planted it—but it's dying.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

A natural dome made of volcanic glass in Inyo National Forest.

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

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

This rock formation named for its unique shape is one of many that call the Alabama Hills home.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.