The hidden lair of an alchemist rediscovered in a 2002 flood.

Two stunning 17th-century libraries and a cabinet of curiosities.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

A forgotten graveyard lost in the tangles of an overgrown garden.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.

A museum in the childhood house of a medical pioneer.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

The Belgian library displays burned books that were salvaged from the fires of both world wars.

A once-magnificent collegiate church is falling into ruin.

This modern arts center is built around a gem of late-Baroque architecture.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

Medical history with an amazing, if frighting, collection of wax diseases on display.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

This German museum is devoted to all aspects of grave culture from headstones to coffins.

This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.

This historic little railroad runs through some of the most beautiful scenery in Germany.

There's an exclusive Beefeaters pub hidden in the Tower of London.