Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

Located more than 600 feet beneath sea level, this tunnel boasts the world's first undersea roundabout.

This Kansas City studio was home to Walt Disney's first animation business.

One of the deepest springs in Missouri.

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

This unconventional used book store was once in the news for the surprising act of burning books.

The obelisk meant to mark the founding father's grave at Monticello is actually on the University of Missouri campus.

During the 19th-century, this park was a vital trading fort.

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

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

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

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

A multiversal transit station located right below a highway interchange.

At the largest railway museum in the United States, you can see everything from an early steam engine to a functioning Thomas the Tank Engine.

A mysterious and terrifying public art goblin seemingly meant to inspire local legend.

A castle built by an eccentric medieval enthusiast in rural Ohio.

The largest self-built castle in the U.S., six decades in the making.

Memorial stone for GWAR vocalist, depicted in his iconic costume.

It's where the final scene of the beloved Tom Hanks movie was filmed.

The top of a giant mesa, just outside of Amarillo, appears to float in the sky above.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

These half-buried combine harvesters just off Route 66 are an homage to the Cadillac Ranch.

The Grand Canyon of Texas.