This hot dog-shaped diner has moved all around Colorado, never been to New York.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

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

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

Southern Italy's spinning top village.

Geometry and mystery come together in an epic show of octagonal masonry.

100 year tradition of fist fights, marked by marble footsteps.

Five candy-colored villages on the Italian Riviera.

Jesus' footprints and the first catacombs in the world.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

2300-year-old Roman road connecting the empire.

The drama of nature in full effect in this Nevada State Park.

Limestone caves with spectacular showcase chambers.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

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

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

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.

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

This massive redwood tree has a hole in the base big enough to drive through.

The fossilized remains of ancient California redwoods.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

A cave's rare beauty held a cavernous secret hidden underground.