Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

A public urinal so pretty, it was declared a national monument.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

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

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

A floating cat sanctuary on an Amsterdam canal.

This vast collection of smoking pipes from across the world spans centuries.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

A beautifully eclectic mix of architectural styles.

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

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

Cat art as far as the eye can see.

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

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

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

This historic hotel invented the chocolate brownie.

An unofficial monument to the late King of Pop sits at the base of a Renaissance composer's statue

This tribute to the 16th-century composer is now an unusual shrine to Michael Jackson.

The medieval network of canals hidden underneath the city is opened to explorers each year.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.