Low-frequency noise compared to an idling train can only be heard by some of this industrial town's residents.

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

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

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

A suspended garden, now gone, once hung in the middle of this abandoned church.

An abandoned relic of the city's failed experiment with below ground transit.

The longest navigable underground river in the United States is home to countless blind and albino animals.

An abandoned theme park with a strange and tumultuous past.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

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