The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

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

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

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

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

Take a leisurely walk through the park to find the seven giant troll sculptures hidden throughout the park.

A jazz band formed by African water animals in the heart of Flemish Brabant.

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

A gender-bending antihero's grave, where lies the inspiration for both book and film.

A pilgrimage site where people ask Saint Dymphna to watch over those who are not of sound mind.

This collection of lurid religious statues tell the tales of a saint who stood down the devil.

This former guildhall with a bacon-like exterior is now home to a museum covering 600 years of Antwerp's musical history.

According to this bar, God gave an “11th commandment” to Antwerp: Thou shalt drink beer.

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

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

To enter this cluttered-yet-cozy sanctum of Belgian brews, ring the bell and tell the gatekeepers you've come “to taste beer.”

This collection of solar timekeepers includes the world's first digital sundial.

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

Dummies recreate radiological discoveries from history.

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

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

A Cold War command center is hidden under an idyllic countryside.