The first declared National Monument in the United States.

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

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

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

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

Every president in history is immortalized in bronze in downtown Rapid City.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

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

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

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

A fitting attraction for the corn capital of the world.

Just a man taking his prehistoric pet for a stroll.

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

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

The hallowed remains of a 900-year old Ancestral Pueblo great house.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

The oldest continuously occupied public building in the United States.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

But did the famous feminist and abolitionist ever really say those iconic four words?

A wonderful and easily overlooked museum tucked in Ohio's Burke Lakefront Airport.

An equine tribute in a charming Southern city that calls itself "The Horse Capital of the World."