Built from oil field parts and resembling a teepee, this abandoned mid-century church is hoping for a comeback.

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.

World War II-era Nazi compound nestled in the Santa Monica hills.

15 monolithic temples emulate an eroding sand castle.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

The site of many battles and tragedies, including the 40 maidens who leapt into the sea.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

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

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

Gutted airplanes slowly decay in a Florida field.

This abandoned school has had many lives since the early 1900s, and all of them doomed.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

Abandoned Nazi train station turned underground astroparticle laboratory.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

An old dining hall now serves up ghost stories for lusty locals.

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

Abandoned Coast Artillery fort now serves as a graffiti canvas and sightseeing vantage point.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

The remains of an old sawmill, gristmill and the surrounding industry dating back to the 18th century.

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

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

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

There might not be much left of these Irish ruins, but their linguistic legacy is still going strong.