The rocks in this arid basin leave trails of movement behind them.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

Giant lamp houses the tourism information center.

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

Version of the French Riviera destroyed by the sea.

Home to the deepest rift anywhere on Earth.

Canyon walls shrouded in ferns.

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

Roman ruins top white travertine terraces formed by ancient hot springs.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Oldest building in California still in use.

Museum dedicated to the art of cutting and polishing stones.

Decommissioned experimental solar facilities that pioneered solar energy technology.

Thousands of turbines whir at at the origin of North American wind power.

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

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

Historic funicular railway, believed to be the shortest railroad in the world.

World's largest collection devoted to one fruit.

America's most famous piece of self-built architecture.

A Circus legend leaves an unexpected endowment.