A fitting attraction for the corn capital of the world.

A museum, walk-through diorama, and library nestled under one castle-like roof.

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

The first declared National Monument in the United States.

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

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

Built in 1931, this small passageway is believed to be the first modern skyway.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

The fifth-longest natural arch in the world, and the longest outside China.

A ghost town that held steady longer than most, but finally gave up the ghost.

Even in death, he's still your huckleberry.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

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

A real flying saucer, contracted by the U.S. Air Force.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

This magnificent Cincinnati graveyard is also a popular public park.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

This railroad overpass is said to be home to a murderous goat-man whose very legend has led to very real deaths.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

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

A floating museum that was sunk by a flood and left to rot in the tides.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.