An urban laboratory.

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

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

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

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

At an isolated roadside rest area stands a monument marking where famous Western star Tom Mix died in 1940.

The stone circle honors the 19 firemen who perished during the Yarnell Hill Fire.

Make a wish at what might be America's only Catholic shrine to a sinner.

A scrap-metal sculpture recalls an infamous 19th-century camel.

Arizona's first government hub is a rustic cabin now preserved as part of a historical museum.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

A towering bronze statue memorializes the founding father of postwar American conservatism.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.

The state's only comprehensive museum dedicated to the mineral that defined its history and economy.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

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.

Stairs often replace streets on the steep slopes of this old mining town.

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

A museum and tribute to a brave profession.

This curiosity shop contains a museum filled with bizarre, unique objects.