A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

A treasure trove of astronomical, mathematical, and scientific instruments at Cambridge University.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

The charming storybook building now houses a small police museum.

The world's biggest floating museum in Gothenburg, Sweden.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

A measuring mishap led to these artificial stone ladies losing their stomachs.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

A traditional American farmhouse plopped in the middle of a Piccadilly courtyard.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

A little slice of Japan and its aesthetics in London's Holland Park.

A unique tribute to the millions of animals who served and died for the British military.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

This 1920s Dutch barge is now a floating bookstore.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.