Ancient human, animal, and geometric figures drawn in the earth.

The location of the last stand of Charles Manson's doomsday cult.

This impressive tunnel was dug entirely by hand over the course of 36 years.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

World War II-era Nazi compound nestled in the Santa Monica hills.

San Francisco Bay's ghost town.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

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

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.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

This Los Angeles animation studio is keeping the wonder of stop motion puppetry alive.

Hidden in the hills of Hollywood, this secluded Oz-themed garden is dotted with dozens of thrones.

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

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

On the Oregon coast there is a natural hole that seems to be draining the sea.

A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Salt is slowly eating away this abandoned saltworks town in the desert.

Machinery left over from California's once thriving mercury industry now attracts artists and explorers.

Ruins of a once-prized railroad station in New York.

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