Once a year, at exactly 11:11 a.m., this monument comes to life.

A Wild West jailhouse that slid down the mountainside.

A geological mystery on Camelback Mountain.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

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

An urban laboratory.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

A stealthy Apache hideaway that became the haunting site of a mass grave.

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

A self-built castle made by a mysterious man.