On a small Slovenian island, diners can mix and match a classic cake into dozens of sweet and savory flavor combinations.

This one-time health resort was used by aristocrats around the world.

A whimsical bridge adorned with decorative dragons.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

Strange rumors surround the artist who created these solemn metal guard dogs.

A public work of art that also provides some relief from the summer heat.

A relic from the Industrial Revolution got a second life as a contemporary performing arts space.

Atop this library is one of the most beautiful green spaces in Warsaw.

A hidden art gallery in an abandoned Warsaw fort.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

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

The bronze uniforms commemorate the vital role of women during World War II.

This one has sailed five times as far as Sir Francis Drake's famous ship.

A cluttered and astounding collection of antiquities and curiosities.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Hundreds of notes give thanks to the patron saint of lost causes.

This hidden collection of everyday objects illustrates life within communist Poland.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

A 20th-century picture show in 3-D.

This heavily worn bas-relief was once an honored fertility symbol.

Hidden along this old street in Antwerp is a surreal monument of a bronze arm sprouting four hands.

This interactive sculpture allows visitors to leave a message in case a friend passes by.

This legendary giant, born from vegetables, terrorized townspeople and cheated local children in games.