A cabinet of curious mathematical models and old calculators.

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

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

This church on a Tohono O'Odham reservation has stood since 1797.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

The biggest solar telescope in the world helps reveal the secrets of our sun.

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

A geological mystery on Camelback Mountain.

North America's largest accredited model railroad museum.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

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

San Diego's most historic and haunted home.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Oldest building in California still in use.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

"Only the devil could play golf here."

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

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

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

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