What happens when you cross a mayor and a painter?

A naturally beautiful, seemingly bottomless deep blue spring.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

An American ghost town hides along a side street in Scotland's capital.

Possibly the world's smallest museum is home to one exhibit that sheds light on the capital city's dark criminal history.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

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

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

Theme park featuring miniature replicas of European monuments.

A rare, flower-shaped example of Brutalist architecture in Switzerland.

One of the most historical literary characters continues to stroll his hometown.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

A garden in Lisbon filled with giant porcelain creatures.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The curios of pharmacist and collector Henry Wellcome.

Legend says these stone structures are where the doomed citizens of a vanished village sent themselves to die.

The second largest in the world, this massive underground void has its own subway.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

The world's largest drain sits below the city of Kasukabe, Japan.

Japanese island famous for poison gas and fluffy bunnies.

Once the most densely populated place in the world, this island is now a ghost town.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.