The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

This massive redwood tree has a hole in the base big enough to drive through.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

Rare recess caves fill this unbelievably beautiful Ohio park.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

Outsider art meets paleontology at this roadside reptile repository.

Visit this playground of waterfalls, caves and sinkholes.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

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

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

The longest living non-clonal organisms on Earth.

When ecosystems collide in the arid Southwest.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

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

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

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

A wall of chewing gum moonlights as collective art.