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

This unattributed sculpture in Amsterdam is hiding in plain sight.

This cheese shop also houses a museum devoted to Dutch dairy.

The history and future of cannabis.

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

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

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

The world's only museum devoted to the wonders of fluorescence.

This red light district plaza memorializes the Fab Four and their historic connection to the area.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Hamburgers are intensely proud of their tunnel beneath the river.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

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

A brush maker used his factory to protect blind Jews from the Gestapo.

One of downtown Berlin's last reminders of its Communist past.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A fascinating insight into daily life in the Eastern Bloc.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A relic of World War I that now exist as a piece of public art.

A highly-criticized monument in Budapest has become the site of a makeshift Holocaust memorial.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.