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

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

A relic of roadside lore and perhaps the first of its kind in North America.

A ghost town now swarming with dozens of prairie dogs.

In addition to fishing and camping, this spot in Nebraska’s Sandhills is one of the world’s darkest places.

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

Roaming bison and a spectacular view at the highest point in Nebraska.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

A rancher expanding a natural spring for his cattle came up with bones – lots and lots of them.

This erect, phallic geological spire wasn't always named so domestically.

The first declared National Monument in the United States.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

One man's ambition created this psychedelic log home.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

Native Americans built this circle of stones, which was used to predict astronomical events.

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

This canyon is named for a unique geologic formation where the river vanishes underground near the mouth of the canyon and reappears farther down.

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

A creek tumbles over a series of step-like rocks to create this scenic water feature.

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

Two geologically young and nearly circular volcanic subsidence craters, each about a half-mile in diameter, abruptly break the nearly featureless Snake River Plain.

The largest outdoor art gallery in the Northwest United States.