At this leafy estate, one man’s passion for trees grew into Arbor Day.

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

The first declared National Monument in the United States.

This now-abandoned part of the original transcontinental railroad route provides a surreal driving and historical experience.

Inside this striking glass building, visitors can see thousands of dinosaur fossils in the positions that nature deposited them more than 150 million years ago.

A museum chronicling pioneer life constructed over Interstate 80.

This was the first homestead registered after President Abraham Lincoln signed the Homestead Act into law.

This little gem of a museum is a hidden jewel filled with prehistoric treasures.

The world’s first penitentiary, meant to be humane, drove men insane.

An unfinished revolving restaurant on a church campus towers over suburban Northeast Ohio

"The Most Boring Road in the State."

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Prayers and messages of hope decorate the ceramic tiles of this pavilion.

Once a slice of Cold War-era military history, this museum is finding its future in the stars.

This once rural mansion now sits in the heart of the city.

A miniature baseball stadium honoring Johnny Rosenblatt Stadium, home of the College World Series from 1950-2010.

A fitting attraction for the corn capital of the world.

This museum glorifies the humble potato.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.

Home to the deepest rift anywhere on Earth.

The home for all things Kool-Aid offers everything except a chance to actually enjoy the drink.

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

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

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.