Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

A cozy bookstore is tucked within an old gold mine shaft beneath the cafe and ice cream shop.

This desert oddity hides in plain sight thanks to a cartographic error and a desert explorer with a punny sense of humor.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

One of the last free public hot springs is decorated with hippie art.

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

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

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

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

Towering basalt columns, a creation of fire and ice.

Quite simply the largest tree in the world (by volume).

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

A collection of haunted objects and macabre oddities under one roof.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

The 7,000-year-old calcium carbonate formation creates a magnificent natural bridge.

A unique geological area spiked with wind-carved rocks that resemble teepees.

"I did this all while you were watching TV."

The U.S. Air Force has an anti-satellite laser weapon.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."