"Polynesia on the Plains."

A rapidly disappearing glacier filled with extinct grasshoppers, perfectly preserved in the ice.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

The only road through the heart of Glacier National Park.

The rocks of a certain area of Butte, Montana give off a musical ring when hit.

Between Missoula and Spokane, a family-owned travel center has an unusual museum in the back.

The oldest bar in Missouri is hidden within a limestone brewery cellar more than 50 feet underground.

A magnificent church designed by world-renowned architect, Frank Lloyd Wright.

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

University City's quirkiest resident lives in a park named after its first.

After miraculously surviving a giant flood, the 19th-century nut tree and its offspring are protected with their own tiny park.

The famous greeting card maker owns a collection of paintings by the famed surrealist.

This is not your typical jungle gym.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

Community bookshelf of 25-foot-tall book spines.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

Less a museum than a bizarre fantasy world created by artists and engineers.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

This steamer is known as "The ship that built Cleveland."

All that remains of a gigantic earth-moving machine.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.