Collect holy water from a Bronx grotto.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

The famous author's cottage hideaway.

Visitors to Salt Springs State Park are encouraged to literally put their two cents in Penny Rock.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

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

A failed piece of Orientalism has become the proud symbol of a community.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

A park full of outsider art, created by college students studying outsider art.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

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

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

Mysterious rocks that ring musically when struck.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A layered tribute to the work of mosaicist Isaiah Zagar.

World's first "penitentiary," meant to be humane, drove men insane.

Featuring the largest CinemaScope screen in Pennsylvania, this drive-in has entertained moviegoers for more than half a century.

A legendary boxing venue and ring featured in Rocky V.

Alexander Hamilton’s creation caused quite a bit of controversy.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

A field of nothing but boulders which resembles a giant's gravel driveway.

It would take 35 firetrucks to fill this enormous glacial pothole.