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

European castle ruins in an American state park are actually the product of death and grief.

The red brick house where the father of rock 'n' roll wrote some of his classic hits.

One man's unrequited love stands in a glass box forever.

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

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

New Zealand's epic shrine to all things puzzling.

An artsy hidden staircase leads to breathtaking views of San Francisco.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

A huge musical instrument played by the ocean.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

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

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

Where the author wrote her beloved "Little House" books.

Like Stonehenge, but with boats and oodles more charm.

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