The largest outdoor art gallery in the Northwest United States.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

These giant metal horses graze on a hilltop near the Montana highway.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A black cottonwood gets a second life as a home for books.

A collection of huge, site-specific sculptures sitting in the Montana woods.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

A strenuous, unofficial trail leads to spectacular views in one of America's most remote national monuments.

Some 10,000 works of ancient rock art cover these volcanic basalt outcrops near the Gila River.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A ghost town in a remote corner of Oregon hosts a touching tribute to Sacagawea’s son.

The "world’s largest honky-tonk" also has its own indoor rodeo arena.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

A brutalist gem towering over the heart of Milan.

A bizarre house filled with an astounding array of collections.

Hidden in the Chihuahuan Desert resides an amazing collection of petroglyphs.

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.

The fifth-longest natural arch in the world, and the longest outside China.

Oddly shaped rock formation, misassociated with a nearby utopian community.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.