Macabre museum devoted to historical Viennese murders.

The beautiful baroque library of the Hapsburg empire.

A striking symbol of the Bulgarian capital.

A spectacular Bulgarian cave resembling a devil's head with a waterfall rushing down its throat.

A flamboyant five-story building in Bulgaria resembles a crawling snail.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

The oldest arboretum on the Dalmatian coast doubles as the gardens of Kings Landing in "Game of Thrones."

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

An ethereal glowing blue ocean cave in Croatia.

This Belgian theme park began as a refuge for bored church children and was closed down when a boy lost an arm.

Take a leisurely walk through the park to find the seven giant troll sculptures hidden throughout the park.

This non-profit theatre in the heart of Brussels is dedicated to hosting independent films.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

Drink among marionettes at this pub inside a historic puppet theater.

This bike path traverses the treetops.

This bike path was sunk below water level for maximum wonder.

A fantastical bed and breakfast with magically unique rooms.