The Dover International Speedway is home to a towering, concrete-skinned, racecar-hungry behemoth.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

This 19th century granite fortification is one of the most well preserved forts in New England.

The world's largest rotating world.

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

An oversized metal construction of Billy Tripp's moods going through life.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

A serene plaza that commemorates one of the Granite State's most iconic figures.

Rock face that shares a name with Mary Shelley's famous doctor.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

America's oldest archaeological site or a muddled case of wishful thinking.

Even Henry David Thoreau found this glacial pothole irresistible.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

Memorializing an American tragedy of massive proportions.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

An abandoned stretch of highway, deteriorating next to the operational one.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

Mysterious rocks that ring musically when struck.

A toxic ghost town sitting atop a massive coal fire.