The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

A giant mascot, a car bomb, and the mafia mingle in the history of a defunct restaurant chain.

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

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

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

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

The historic “pink house on the hill” is an architectural gem that now serves as a center for water conservation.

A geological mystery on Camelback Mountain.

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

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

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

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

Mexican food and folk art.

These structures were inspired by both Native American shelters as well as, strangely, an ice cream shop.

A world-class observatory in the California desert.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

The ghostly remains of an accidental sea.

In this roadside "community for the small," abandoned toys gain new lives.

A museum dedicated to a sea that should have never been.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

This outdoor observatory offers stellar views and a scale model of our solar system.

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

This conservation area is also home to many of the region's desert tortoises.