Dozens upon dozens of boulders engraved with scripture tell the story of one man's troubled life.

For decades, it has disappeared and reappeared as water levels rise and fall.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

Where America's first doomsday cult awaited the end of the world.

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

Ship skeletons haunt Baltimore's waterways.

This abandoned subway station can still be seen on regular commuter trips.

Abandoned power station once home to a squatter community, now being developed into an arts center.

Hidden deep within New Jersey Pine Barrens is a massive graffiti wonderland.

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

The rusting remains are visible sticking out of the waters of the Delaware Bay.

World War II bunker still standing on the New Jersey beach.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

Step inside Lucy, the world's largest "elephant."

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

A unique sculpture park that specializes in the huge and bizarre.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

A wrecked ship dating back to the American Revolution was only recently discovered off the Delaware coast.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

An eerie, decaying ghost town destined to fade into the forest.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.