A floating cat sanctuary on an Amsterdam canal.

Cat art as far as the eye can see.

This Central New York ghost town was once a prosperous railroad community.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Amsterdam's Red Light District leaves little to the imagination.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

The world's only museum devoted to the wonders of fluorescence.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Architectureal fantasy quarter of Rome.

A 16th-century horror show built in a lovely Italian garden.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

The old tradition of drying laundry on poles in the public green is still guaranteed by Glasgow city law.