This central Nevada cave is the spiritual home of ancient and enigmatic pictographs.

This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.

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

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

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

Home to New Mexico's longest bar, this watering hole also has a mining museum and a haunted history.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

The building stands within a quiet, postcard-perfect New Mexico village.

This highest peak in New Mexico is named after an explorer who had a habit of lending his monicker to peaks.

Some 2,000 carvings show this rare desert spring has been an oasis for travelers for over a thousand years.

More than 21,000 images fill this overlooked gem of a prehistoric site.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

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

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

A clear blue swimming hole with hidden caves, still unexplored.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

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

This trail leads to a mine that was used as a sanctuary during the Great Fire of 1910.

The secluded site of a 1943 plane crash and amazing rescue is only accessible by hiking through the woods.

This highest peak in Idaho can only be reached by traversing a formation known as "Chicken-Out Ridge."