The world's largest Holstein cow.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An architect's childhood fantasy treehouse made real.

A beautiful geyser under environmental threat.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

A museum chronicling pioneer life constructed over Interstate 80.

The first declared National Monument in the United States.

A cemetery housing wild west legends in South Dakota.

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

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

A fitting attraction for the corn capital of the world.

A mysteriously dark cemetery monument fuels stories and legends galore.

One of just a few cities in the world to base their center of government on an island. Others: Paris and Osaka.

The last location where Buddy Holly, Ritchie Valens, and J. P. "The Big Bopper" Richardson played before their tragic deaths.

This massive roadside mascot was the first version of the giant to illustrate his butt.

This 19th century Sioux City candy company is the home of the Twin Bing, a historic, chocolate-covered treat.

This simple home was the beginning of a long journey for the iconic Western film star.

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

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

The World's Largest Bull.

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