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

A unique sculpture park that specializes in the huge and bizarre.

The curious underground history of keeping Paris clean.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

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

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

A layered tribute to the work of mosaicist Isaiah Zagar.

The first American department store, and home to the largest operating musical instrument in the world.

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

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

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

Dr Barnes' $25 billion private collection of art and arboretum.

A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.