Limestone caves with spectacular showcase chambers.

A sharp bend in a dramatic river canyon cut through red rocks.

Take a monster truck tour around an ostrich farm in the middle of the desert.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

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

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

A Wild West jailhouse that slid down the mountainside.

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

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

Inside this garden, visitors are offered a glimpse into how inhabitants of the region survived centuries ago.

Opinions differ as to whether this Arizona tree was actually used as a Wild West jail, but that hasn't stopped the town from capitalizing on it.

This abandoned horse racing track was an exercise in hubris from its inception.

A self-built castle made by a mysterious man.

The unusual burial monument of Arizona's first governor.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

This unique competition celebrates an American Indian and Canadian First Nation cultural tradition.

The first permanent memorial to a unique secret weapon of World War II.