A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

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

A beautifully eclectic mix of architectural styles.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This plaque marks the former home of one of the first women physicians in the Netherlands.

Where royalty waits in the height of luxury.

A floating cat sanctuary on an Amsterdam canal.

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

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

The largest flower auction house in the world.

This unattributed sculpture in Amsterdam is hiding in plain sight.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

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

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

Most prolific publishing house in the 1600s open to the public.

A little sculpture with a large wardrobe.

When you're a great Russian Tsar, even your vomit gets a statue.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Christ's blood allegedly preserved in a Belgian town.

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

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