The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

See massive fossils that are over 200 million years old in northeastern Arizona.

This railroad magnate's 19th century tower is more than a little bit out of place in the Nevada desert.

Only intact Ichthyosaur skeleton in the United States.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

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

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

The oldest continuously operating church in California.

This remarkably simple jail went over a century without an escape.

A trash dump made beautiful by nature's power.

An abandoned boat that's been stranded mysteriously for decades.

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

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

The world’s largest concentrated solar plant generates as many problems as megawatts.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

Quite simply the largest tree in the world (by volume).

Abandoned hotel with adjacent lake and golf course.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.