Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

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

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

This unassuming building houses one of the world's most extensive collections of cars created by automotive legend Carroll Shelby.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

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

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

The United States's largest hand-dug well is topped with a state-of-the-art museum.

One of the first intercontinental ballistic missile sites in the United States.

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

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

This Great Plains museum pays tribute to both the prosperity and tragedy of the North American fur trade.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

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

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

This museum started by a curious collector is now a place for believers and skeptics alike.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.

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

Metal sculpture folk art lining the Kansas Highway.

A eclectic collection of military memorabilia.

Also known as the Cathedral of the Plains, this church holds the distinction of being one of the "8 Wonders of Kansas."

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

Four ionic columns from the Treasury Department building ended up in a park in Nebraska.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.