This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

Giant busts of 42 U.S. presidents sit, crumbling in a field in Virginia.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

The oldest continuously inhabited street in America.

One man's swirling six-acre monument of stone.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

An unassuming island in the middle of the Hudson that hosts campers, including Aleister Crowley.

The rustic think-space of famed naturalist John Burroughs stands exactly as he left it.

"A hideous albatross in the Hudson River Valley."

An homage to everyone's favorite prehistoric cartoon family.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

An urban laboratory.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A semi-scholarly approach to sex.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The home of aviation trailblazers, in a remote corner of the big city.

Unlock the secrets of the conjuring arts.

The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.