What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

Resonating tubes make music from highway overpass.

On the coast of Sardinia, a once-great mining village is finding new life as a coastal resort town.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

The remains of a failed subway in upstate New York is now an underground graffiti bunker.

An abandoned stretch of highway, deteriorating next to the operational one.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

Protecting the future of some of the rarest and most misunderstood mammals of North America.

This abandoned ironworks was once the most important military supplier in America.

This forlorn park is the result of a failed investment turned tax dodge.

A former copper mine which became a truly unsuccessful prison.

This decrepit abandoned building is made all the more eerie by its dark history.

This forgotten graveyard in rural New York State once served a pioneering hospital.

Haunted Victorian house that inspired a legendary "Ghostbusters" court ruling.

The ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

An unrealized dream to wirelessly electrify the entire Earth.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

Underground tunnels remain beneath this abandoned mental asylum.

Mansion and shopping center used in the 1975 film "The Stepford Wives."

A few stone foundations and an old graveyard are all that is left of this once thriving settlement in the wilds of Connecticut.

This opera house along the banks of the Connecticut River has two Tony Awards to its credit but it’s never staged a single opera.

Final resting place of a New Haven urban legend.