There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

A book bound in the skin of an infamous criminal, along with countless other specimens.

Now in ruins, this castle stood for centuries and saw a number of gruesome events.

This neon sign is an homage to an Alfred Hitchcock film.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

The first museum in the world devoted to sexual gadgetry.

A surreal statue honoring Prague's favorite literary son.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

A church of bones, decorated with 40,000 human skeletons.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

Monument to a suicide protesting the Soviet invasion.

A series of playful yellow penguins share a serious message about the environment.

Macabre astrological automaton clock dating to the late 1400s.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

This painting of a beloved dog will be on display at the Scottish National Gallery at long as the museum exists.

A single oak tree rises out of the waters of Loch Lomond.

These ancient symbols freckling a Scottish cliff remained hidden for centuries.

A bay of elaborate, historic toilets are held in high esteem at this Scottish dock.

A historic cave in Scotland once served as a hiding place for a famous Covenanter.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.