The writing studio of an American adventure author, built in the style of a medieval castle.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

This 1,700-pound edible sculpture is way better than your average chocolate mousse.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

The world's largest rotating world.

The house and graveyard used in the Stephen King spine-chiller.

This tiny patch of arid sand sits in one of the greenest states in the United States.

The eccentric mansion of one the most popular horror authors of modern times.

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This building at the south end of the boardwalk was once home to the U.S. Life-Saving Service and the U.S. Coast Guard before being rescued itself.

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

The whole world in one water tank.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.