Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

Ruined pieces of stone and a swimming pool are all that remain of an amusement park swept away by a flood.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

Nature and art meet in this curvy creation

One-layer pyramid in Indiana.

This unassuming home was once “grand central station” for the Underground Railroad.

Modeled after the labyrinth in Chartres Cathedral, this small-town Indiana memorial labyrinth sits half a world away.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

This old steel industry company town has a tradition of parking cars on the sidewalk so people can walk in the narrow streets.

Tucked away in the forests of Indiana resides an abandoned waterslide that is now a popular graffiti haunt.

Monkeys lounge around at this 13th century temple.

There's something big lurking beneath the surface of this tiny Oregon park.

A monument to the 17,000 Chinese who worked and died to build Canada's Pacific Railway.

The highest point in Belgium is a staircase to nowhere.

Two distinctive homes on a New England village green look like a couple of frosted wedding cakes.

A decommissioned submarine base makes a great space for graffiti art.

Henry Ford's failed rubber plantation in the middle of the Amazon rain forest.

An abandoned swimming pool decays on the outskirts of Berlin.

A forsaken wonder in the middle of the East Side neighborhood.

The overgrown remains of an old rail bridge rise above the valley like ancient Greek ruins.

For six months of the year, three giant mirrors direct a pool of sunshine onto this otherwise occluded town.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.