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 are sitting 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.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

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