This enormous abandoned factory is now a makeshift graffiti gallery.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

A curious blend of taxidermy, antique tools, creationism, and a purported antediluvian rock.

Abandoned concert venue legendary for its rock counterculture.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

The bones of an old zoo crumbling in the shadow of a new one.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

A Beaux-Arts triumph set to become Ford's innovation campus

This railway-turned-greenway provides a pedestrian link in downtown Detroit and celebrates urban artwork.

Opulent downtown movie theater now houses cars as an indoor parking garage.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

The Natural History Museum that time forgot.

A steam trawler with a whiskey-soaked history driven ashore in 1960 resides rusty but still standing on the shoreline.

A remarkably intact castle that once was the largest in Ireland.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

An unusual manor of stunning beauty, born out of a crippling disease.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Moss and stone turn this waterfall into an otherworldly liquid veil.

No one knows who built this strange cave of worship or exactly why.

Romania's only crater lake with water as pure as if distilled.

This massive underground salt mine now holds a sci-fi theme park in its depths.