Considered by many to be one of the most dangerous highways in Alaska.

Thousand-year-old trees tower within one of the world's only inland temperate rainforests.

Every fall this lake mysteriously drains, like a bathtub with the plug pulled out.

This small piece of railroad history sits behind the parking lot of a chain grocery store.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

The oldest standing structure in downtown San Diego.

What began as an illegal art installation has become a symbol for unity, ocean awareness, and coastline preservation.

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

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

An incredible collection of Mesoamerican art assembled by one of Mexico's great artists.

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.

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

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

Every president in history is immortalized in bronze in downtown Rapid City.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Just a man taking his prehistoric pet for a stroll.