This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

A historic covered bridge is but one example of an oddly prevalent American urban legend.

This park contains a number of standing stones meant to heal and inspire.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

The oldest farmer's market in America is so ancient it was approved by the King of England.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

Delicate Wurlitzers, creepy clowns, and The Noid all share space in this insane explosion of kitsch history.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

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

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Where America's first doomsday cult awaited the end of the world.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

Series of storm drains connected to a dark urban legend.

Check out the underground party scene at the "Burning Man of Brooklyn."

Join in a Seance at the Swedenborgian Church.

A semi-scholarly approach to sex.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Tucked in the back of this amazing antique store is an important piece of medical history.

A no-frills cinephile haven known for showing offbeat, underseen films.