The highest point in Washington state is a volcano covered in glaciers.

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

Mountain known by the Tillamook Tribe as "the place of the supreme deity."

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

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

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

This graveyard is the eternal home of many brave pioneers who settled the Great Northwest.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

Delightful disarray of found objects and clutter.

A unique botanical garden housed in three giant geodesic domes.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

The secret city built by the Manhattan Project.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

The record holder for the world’s largest peach.

A fitting attraction for the corn capital of the world.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

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.

The first declared National Monument in the United States.