A brick-paved former section of the historic coast-to-coast highway.

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

European castle ruins in an American state park are actually the product of death and grief.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

Massive still life just off the highway in Kansas.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

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.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

This massive roadside mascot was the first version of the giant to illustrate his butt.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

This lesser-known geographic marker was the reference point for all surveys of the continent for 75 years.

The abandoned remnants of a little sanctuary for world peace that fell into disrepair.

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 car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

Giant granite rocks standing end-to-end like a train of circus elephants.

This is not your typical jungle gym.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

Less a museum than a bizarre fantasy world created by artists and engineers.