See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

This historic national park is covered in the stunning ruins of red rock pueblos.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

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

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

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.

Semi-recognized center of the world, with many oddities.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

One of just a few cities in the world to base their center of government on an island. Others: Paris and Osaka.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

Just a man taking his prehistoric pet for a stroll.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The first declared National Monument in the United States.

The only road through the heart of Glacier National Park.

Spectacular views await visitors to this lake.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.