This striking royal residence is the largest Renaissance-style castle in Scandinavia.

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

In the depths of Glasgow Cathedral's crypt, one pillar stands out from all others.

A wonderfully eclectic Victorian aquarium lies in the basement of the Horniman Museum.

The narrow passages will challenge even the bravest driver.

The medieval woodcut-style artwork chronicles life in medieval London.

A mysterious shape catches the eye in this 16th-century painting.

An early 20th-century bullring converted into a modern shopping center.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

The little-known second castle that William the Conqueror built in York.

This 17th-century pub once had a hole in its wall so the neighboring blacksmith could easily access beer.

Scotland still bears an enormous scar of its Roman past.

Central Europe's largest collection of mini-bottles is on display at this museum devoted to a bitter Hungarian liquor.

Hidden in the courtyard of the Victoria and Albert Museum is a little-known tribute to two celebrity pooches.

An impressive armored bronze effigy marks the tomb of one of the medieval era's greatest warriors.

These semi-natural waterfalls hint at the park's Victorian-era industrial past.

Legend says this rock was once a chopping block for public executions.

This giant glowing "beanpole" adds much-needed pops of color to an otherwise drab power plant.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

A lush indoor jungle fills this bustling Madrid transportation hub.

A set of medieval stained-glass windows tell the gruesome story of a Viking siege.

The walls and streets of the ancient city are peppered with penises.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.