This arid landscape was once a lush wetland. Today, it's a paleontological site filled with fossilized mammoths, sabertooth cats, and more.

An unusual slot canyon in the Aztec/Navajo Sandstone has a cross-section like an inverted old-fashioned keyhole.

This sign designates the road that leads to the infamous Area 51.

A hidden slot canyon in the southern Nevada desert makes an unexpected oasis and scenic hike.

Thousands of glyphs created by an unknown culture decorate the rock formations of this canyon.

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

The eerie ruins of an isolated abandoned town nicknamed "the Widowmaker" for its deadly gold mine.

Potential high level nuclear waste storage site for the next 10,000 years and beyond.

This massive crater in the middle of nowhere was used to train astronauts for moon landings.

Mine your own precious stones.

The wild west is still alive and well at this authentic mining town watering hole.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

A rugged lava field dotted with molds of the ancient pines that were growing when the volcano erupted.

A volcanic landmark located on an Ice age lake bed.

The world's last remaining store of its kind.

A volcanic fissure over two miles long and up to 70 feet deep.

This charmingly homemade amusement park has been growing for 40 years.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

This Cold War missile launch site has been abandoned for 40 years.

The world's largest wooden trestle stretches across this desert canyon in Anza-Borrego Desert State Park.

The largest man-made crater in the U.S. marks the spot where we once tested mining with nukes.

The world's first commercial spaceport is a disappointment of cosmic proportions.

Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.