These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

Inside this store, a mysterious statue draws visitors from the world over.

A Wild West jailhouse that slid down the mountainside.

An excursion train traverses a picturesque red-rock canyon along the Verde River.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

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

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

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

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

Limestone caves with spectacular showcase chambers.

The world's largest military aircraft cemetery.

America's only nuclear missile silo open to the public.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

The biggest solar telescope in the world helps reveal the secrets of our sun.

A self-built castle made by a mysterious man.

Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

Once disputed as the largest sundial in the world.

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.

These free-roaming horses were once destined to disappear from the land.