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

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

Known as "The Hill of the Little Devils."

One of the world's most definitive collections of musical instruments, spanning all cultures and historical periods.

An entire city block built completely out of petrified wood.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

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.

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

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.

One North Dakota man's vast collection of rare rocks, polished orbs, and geological wonders.

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.

This museum is a full-size replica of an original church constructed during the 13th-century.

For one month, the fields and skies of Gibbon, Nebraska, come alive with one of the largest gatherings of sandhill cranes in North America.

A Winnebago Tribe collection featuring arrowheads, artwork, and a mysterious rock carving.

America's largest man-made forest was planted in an effort to bring back the past.

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

Underneath downtown Lincoln resides a network of caves that was also the city's first brewery.

Roaming bison and a spectacular view at the highest point in Nebraska.

An experimental, automotive replica of Stonehenge.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.