Watch the local Netherlands birds from inside this giant eco-egg.

The bridges portrayed on EU currency aren't fictional anymore.

Cat art as far as the eye can see.

A set of seven houses, each built in a style that represents a European country.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

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

A 1930s-style speakeasy with a secret doorway and one-of-a-kind cocktails.

A fantastical bed and breakfast with magically unique rooms.

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

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

A beautifully preserved and hidden 16th-century alleyway, tucked behind an unassuming door.

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

A man throwing a giant severed hand towers over Antwerp’s main square.

2300-year-old Roman road connecting the empire.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

A portrayal of two lamps embraced and in love.

The bears of Bern have been a city highlight for over 500 years.

This bunny-eared Moses represents an attempted compromise between two biblical interpretations.

One of the few places in the world that let's you legally relieve yourself on a UNESCO world heritage site.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The Swiss artist's bulbous and overgrown shape-shifting sculpture controversially graces the center of Bern.