This massive oak tree has ties to the first native tribes of the region and the founders of Texas.

The final resting place of infamous outlaw Clyde and Marvin Barrow.

Nature has shaped this drainage tunnel into the digestive tract of a mighty beast.

This pristine World War II airfield gives a comprehensive look at atomic development and aviation history.

This magnificent natural sandstone bridge is one of the largest in the world and is an iconic symbol for Lake Powell.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

This mesmerizing and surreal landscape features intricate patterns of white and red sandstone.

The cinder cone volcano with a less than complimentary name.

What began as a prominent Burning Man art piece is now an iconic symbol of downtown Reno.

What once housed a private club catering to Comstock Lode elite is now considered one of the West’s most haunted spaces.

The museum is housed inside the historic 1863 Carson City Mint.

A stretch of highway even lonelier than the so-called "Loneliest Road in America."

These markers are used to document elevation changes around the famed dam.

The precious-metals strikes dating back to the 1860s are now mostly inactive, but this area has become the United States' only domestic source of lithium.

This lonesome Monterey cypress has survived centuries of wind, salt, and at least one attempt at arson.

At the western edge of Palm Springs, a rugged desert canyon trail leads to a waterfall at the base of the San Jacinto Mountains.

A collection of anti-communist sculptures stands watch in the Mojave Desert.

A unique collection of old miners' cave homes carved in to the hillside cliffs near Death Valley.

The second-largest giant sequoia in the world.

The Route 66 institution that inspired Taco Bell also served as an important headquarters for Mexican-American social movements.

The helicopter that "Tricky Dick" absconded from the White House in on his last day in office.

Allegedly haunted by Walt Disney himself, this inconspicuous lamp is always kept lit in his honor.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.