The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Home of mutant livestock.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Jurassic Park—A Still Life.

Largest collection of mounted dinosaur specimens in the world.

The extensive collection of an amateur naturalist.

Dig for your own trilobites in this goldmine of invertebrates.

The legend of a local monster still haunts this small town.

This former mining town was named the most toxic town in America.

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

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

The largest source of fossilized insects anywhere.

When ecosystems collide in the arid Southwest.