One woman's Viking Castle on Lake Tahoe.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

A sharp bend in a dramatic river canyon cut through red rocks.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A museum dedicated to a sea that should have never been.

Experience a charming 1930s version of "infotainment."

The unbelievably opulent home built for an infamous newspaperman.

A trash dump made beautiful by nature's power.

A hard-to-reach oasis in a desolate corner of Death Valley National Park.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Only intact Ichthyosaur skeleton in the United States and an abandoned gold mine and ghost town all in one place!

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

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

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

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

Eastern zen meets Western grit in these four little trees growing out of a rock on Lake Tahoe’s Nevada shore.

This historic estate on the east shore of Lake Tahoe was home to an eccentric millionaire (and his pet elephant, Mingo).

Small Nevada town embraced its designation as the "Armpit of America" with an Old Spice-sponsored festival.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

This ancient village provides insight into the complexity of the pre-Columbian Fremont Culture.