An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.

A half-size replica of the World Trade Center towers above Tulsa.

A Route 66 filling station that was designed to resemble the Hagia Sophia, and is now the symbol of an arts district.

Standing at 21-feet tall, this space cowboy adds to the legacy of Route 66's muffler men.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

These massive mitts are made of 30 tons of devotional bronze.

Home to a timed geyser created by complete accident.

A spiritual vortex among the red rocks in Sedona.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

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

The exit of the largest prisoner-of-war escape attempt on American soil during World War II.

A historic hydroelectric power plant serves as the unusual backdrop for a public park.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

A geological mystery on Camelback Mountain.

A $100,000 tumbleweed decorates an Arizona park and ride that got its priorities a bit tangled.

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

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

The unusual burial monument of Arizona's first governor.