Amsterdam's former hotspot for public executions and dissections.

A nomadic museum known for its art exhibitions about religion and faith.

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

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

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

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

The largest collection of handbags in the world, the oldest of which were used to carry Bibles, primarily by men.

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

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

This unattributed sculpture in Amsterdam is hiding in plain sight.

A beautifully eclectic mix of architectural styles.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Cat art as far as the eye can see.

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

This imposing 20th-century castle was abandoned before it was ever completed.

A World War II torpedo launch station abandoned off the Polish coast.

The two abandoned overpasses are among the largest bridges in Poland.

Museum dedicated to "the man who moved the Earth."

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

Deep in a Polish forest, this collection of Iron Age megaliths still holds onto many of its ancient secrets.

A haunting deserted hotel is a favorite with artists and photographers.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

Modern art commemorates one of the first military actions of World War II.

This Communist-era residential block is one of the longest residential building in Europe.