The land is home to swimming ponies and a legendary 18th-century treasure.

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

There aren't too many operational funiculars around, but Pittsburgh has two!

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.

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

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

Faces carved into the cliffs create an otherworldly walking trail.

A mysterious echo seems to defy the laws of acoustics.

"A hideous albatross in the Hudson River Valley."

A grotesque Fiji merman dwells within this traditional Dutch-style building.

Designed to commemorate the founding of the first settlement in Delaware.

The historic home still shows the scars from a little run-in with the British in 1813.

World War II-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers.

The library of every book lover's dreams.

A layered tribute to the work of mosaicist Isaiah Zagar.

The world’s first penitentiary, meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

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

A mailbox that saved a nature reserve.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

The location where the American Revolution ended.

This museum explores the grim reality of life in the earliest British colonies in America.