Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

A former plague hospital turned medical museum.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

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

Colorful and chaotic stacked hotel in North Holland.

This unattributed sculpture in Amsterdam is hiding in plain sight.

A beautifully eclectic mix of architectural styles.

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

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

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

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

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

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

These medieval skyscrapers dominate the skyline of this small Tuscan town.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.