This historic cliffside mansion uses a natural cave for air conditioning.

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

Another in a long tradition of legends regarding infernal seats.

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

A museum devoted to osteopathy and its creator, Andrew Still.

This massive marble memorial was built bit by bit either out of devotion or spite, but at the expense of the surrounding town.

A Mormon place of exile in Missouri.

This art deco masterpiece was once a miracle spring mecca but is now simply a government office building.

A small town garden is dedicated to a psychic dog with the most soulful eyes.

This quaint museum lets you take a ride on its antique carousels.

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

Destroyed by flood waters, prison now serves as a training ground for armed forces.

Erosion and time have created a naturally-formed water park.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

One-layer pyramid in Indiana.

If astronomy had a ghost, it would look like this observatory.

Curious cave that stays a cool 56 degrees all year long.

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

This Art Deco masterpiece has stood in for some of the most famous buildings in comic book history.

This little Vancouver shack is a temple to all things Hendrix.

Have fun at the world's first Buddhist waterslide park.

Where the lovelorn find a home for their sentimental keepsakes.

The world's first time capsule lies behind a welded steel door in Atlanta.

An isolated beacon with a history of grisly murder and a view of some of literature's greatest inspirations.