This softly rounded mansion was built without corners not to avoid evil spirits, but to make them more comfortable.

This abandoned island off the Venetian coast has been a radical monastery, a political prison, and a secret Nazi base.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.

The ruins of this Brazilian island prison still bear the scars of the bloody rebellion that closed it down.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

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

Despite repeated attempts to make it work, this former mining town is now nothing but dust and memories.

This abandoned 19th century orphanage started as a boarding school for children of Civil War veterans.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

A bloody history is captured in this former prison turned museum.

What was once the base for Russia's first nature reserve is now a ghost town, right on the shore of Lake Baikal.

One of Ireland's most infamous prisons for rebels including men, women and children.

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

Former farm staffed by mental patients is now a public park.

The abandoned hospital whose elaborate ghost stories cover up the dirty truth - an uneventful sanitation issue and other mundane reasons for its demise.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

One of the ghostly stops along Route 66.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

The liveliest ghost town in the state.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

Now abandoned, this East Austin school for the disabled began as the "State Colony for the Feeble-minded."

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