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

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

An entire city block built completely out of petrified wood.

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

A fitting attraction for the corn capital of the world.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

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

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

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.

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

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

A rancher expanding a natural spring for his cattle came up with bones – lots and lots of them.

When an ancient supervolcano erupted, some of Nebraska's prehistoric animals were forever preserved in ash.

America's smallest town is run by its single citizen/mayor/librarian/bartender.

Enjoy a tour of oddities and makeshift monsters at this souvenir store with an offbeat sense of humor.

Step back in time at this 1950s display home, built to showcase once cutting-edge electric amenities.

A house turned museum is the real-life "home" of the fictional main character of The Wizard of Oz.

A wonderful collection of all things Oz is nestled in the heart of Kansas.

The quirky collection includes treasures like Elvis' underwear, Bob Barker's toothbrush, and hundreds of sock monkeys.