The seventh largest spring in the world.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

A curious sculpture garden and museum in Cochrane, Wisconsin.

Expansive and colorful studio of Minneapolis art-star, Doug Padilla.

The world’s largest combined collection of U.S. and Russian aircraft got its start in a poultry building.

The largest mural in the world painted by a single artist.

Homestead Cemetery hold the remains of the United States' first known professional tattoo artists.

In the aftermath of the murder of six educators at Sandy Hook Elementary School, a memorial was constructed to remember all the teachers, administrators and staff who lost their lives.

This stadium was the home of the first organized night baseball game.

A Jurassic artscape composed of transmission casings and other mechanical parts.

An outsider art studio that created a piece of work so popular they had to turn mainstream.

Some say that the battle fought at this Kansas site in 1856 was the first unofficial battle of the American Civil War.

One of the oldest continually operated libraries in Kansas.

This small, independent museum documents the unique culture of Deaf people in the United States.

Millions of dollars worth of sculpture decorate this Iowa city center.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

A replica of the self-taught naturalist's iconic cabin stands inside a library near his hometown.

A celebration of the animation wizard's childhood home and antique railroad memorabilia collection.

A eclectic collection of military memorabilia.

The house where the famed outlaw was shot by a dirty coward is now a museum to the criminal's legacy.

The fastest mail service in the west is tracked and memorialized along this 1,400 mile trail.

A Mormon place of exile in Missouri.

This original Mason-Dixon line cairn placed in the 1760s was put in the wrong location because of the gravitational pull of the Allegheny Mountains.