This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Tucked in the back of this amazing antique store is an important piece of medical history.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

Climb inside an iron crystal magnified 165 billion times its normal size.

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

Science meets wall art to highlight the beauty of famous mathematical equations.

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

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

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

A floating cat sanctuary on an Amsterdam canal.

Cat art as far as the eye can see.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

A 141-foot wave of crashing lumber guards the entrance to the Grand Place in Mons.

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

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

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

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

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

Petting this mysterious iron monkey supposedly brings good luck.

Meet the bronze beloved pet to a family of famous peeing statues.

Only museum in the world devoted to bookbinding and book arts holds a permanent collection representing five centuries.