The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

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

A museum in the childhood house of a medical pioneer.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Once the home of a hermetic monk, this cave now houses a small church.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

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

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

A historic hill of tall tales, with one rather special tree.

A relic from one of London's worst 19th-century slums.

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

This overlooked street light once served as a KGB dead letter box.

Historic church where a number of Shakespeare's actors are buried.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

This 1920s Dutch barge is now a floating bookstore.

The breadfruit-adorned final resting place of the infamous Captain of the HMS Bounty.

The last four extravagant street signs of London's historic banking street.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

This home on a quiet suburban street is completely covered with vibrant mosaics.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.