A ghost town now swarming with dozens of prairie dogs.

The final resting place of the Hunkpapa Lakota leader Tatanka Iyotaka, commonly known by the English translation Sitting Bull.

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.

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

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

A wonderland of caves in eastern Iowa.

The cliff and rock formations are made out of Sioux Quartzite.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

Known as "The Hill of the Little Devils."

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

An obelisk commemorating Lincoln's role in connecting the coasts.

Remnants of a quarry company town still stand on the banks of the Wapsipinicon River.

Two hula hoops appeared on the tree after a storm, and the collection kept growing.

The highest point in Iowa, while not that impressive to mountain states, has earned its own monuments.

No one knows the origin of this small town’s unique name.

This long unused shot tower on the Mississippi remains a point of pride for a small city in Iowa.

An eclectic assortment of medieval architecture in a small Iowa town.

The World's Largest Bull.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

A trailblazing sovereign nation tucked in the American state of Wisconsin.

A house and yard adorned with bizarre concrete sculptures in a Milwaukee suburb.