A modern day curiosity cabinet.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

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

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The cinder cone volcano with a less than complimentary name.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

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

Eons ago, a rushing lava river formed this pristine passage through solid rock.

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."

A ghost town that held steady longer than most, but finally gave up the ghost.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

This quirky hot springs town known to locals as "T or C" was named after a radio show.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

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

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."