One of the most unusual geological features, recognizable from a dozen hit movies.

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall but rather lightning.

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

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

San Francisco Bay's ghost town.

Successful artist residence program has filled this ranch with dozens of sculptures over the years.

Dive bar built out of the remains of a whaling ship.

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

Monumental sculptures of Patrick Amiot, constructed from debris, detritus, and determination.

Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

Beyond being incredibly fun, not much can be said about the Hole with certitude.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The smallest country in the world.

Commonly referred to as the most photographed Victorian home in the United States.

A Mysterious Masonic tomb in San Luis Obispo.

An alley covered with 20 years of bubble gum.

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

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

Towering basalt columns, a creation of fire and ice.

An optical illusion found amid a logged redwood forest.

This massive redwood tree has a hole in the base big enough to drive through.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A trash dump made beautiful by nature's power.