On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

Ancient pueblos built into the base of a natural canyon wall.

Limestone caves with spectacular showcase chambers.

A spiritual vortex among the red rocks in Sedona.

The fading, forgotten remains of a once bright and booming factory.

America's only nuclear missile silo open to the public.

This historic national park is covered in the stunning ruins of red rock pueblos.

An homage to everyone's favorite prehistoric cartoon family.

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

A reproduction of earth's many biomes.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Dramatic river bend surrounds a natural red-rocked pedestal.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.