An abandoned boat that's been stranded mysteriously for decades.

Hidden among the multi-million dollar mansions in the Santa Cruz hills is a sanctuary for troubled birds.

Once the largest winery in the world, this castle-like building now sits abandoned on the San Pablo/San Francisco Bay shore.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

America's most famous piece of self-built architecture.

The only Frank Lloyd Wright-designed structure in the architect's hometown.

A tiny 1857 chapel sits on top of a secluded, forested hill.

Picturesque and haunting, these 160-year-old stone ruins on top of a bluff are the only remains of a settler's legacy.

Software company Epic Systems has created one of the strangest and largest workplaces of all time.

This mechanical wonder towers above a river in Michigan's capital city.

Once the extravagant escape of the Ford family, this enigmatic ruin now stands as a haunting reminder of its former glory.

This Gothic castle was inspired by Erik the Red's Viking residence at Brattahlid in Greenland.

The remains of a paranoid inventor's hidden workshop lie in beautiful ruins amidst a Canadian park.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

Home to the abandoned Tioronda Hat Works Factory, this park is a combination of woodlands and marshlands.

The remains of what was once the world's steepest passenger funicular.

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

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

One of the earliest bowling lanes in the U.S. doubled as a sewing school during a time when women had little job opportunity.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

This observation tower is a longstanding, 1960s landmark in the Thousand Islands region of Canada.

This island castle contains enough secret passageways to support a season of Scooby-Doo episodes.