A 16th-century Andalusian palace.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

You can still see bits of the camouflage used to hide this Art Deco building from bombers during World War II.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

This secluded walkway overlooks a magnificently wild London green space.

Taxidermied animals galore, by appointment only.

This grave marks one of few bodies retrieved from the disastrous Franklin Arctic expedition.

A gigantic mechanical bull rages over unsuspecting passengers at Birmingham’s central station.

This rare aquatic phenomenon is one of the more accessible tidal bores in Morecambe Bay.

Once the last route taken by condemned prisoners.

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.

A rare wooden coffin set vertically into the Gothic arch of an ruined church.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

One part local history, 99 parts gruesome haunted house.

Lurking among the classical architecture, rose gardens, and art of this historic country house—a crocodile in a bathtub.

Cat art as far as the eye can see.

Amsterdam's former hotspot for public executions and dissections.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

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

A set of seven houses, each built in a style that represents a European country.

This plaque marks the former home of one of the first women physicians in the Netherlands.