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

This ancient stone bridge dates back to the early Middle Ages.

Macabre astrological automaton clock dating to the late 1400s.

A model train wonderland hidden beneath Gare de l'Est station.

A giant interactive periodic table with real samples of the elements.

This artist's home turned gallery/museum preserves the creator's love of "Eastern" influences.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

Take a schvitz just like an infamous Soviet dictator while his unblinking eye looks on.

The cheese slicer may be a Norwegian invention, but the biggest ones in the world are found in Sweden.

This disputed feline sculpture is Sweden's first MeToo monument.

This statue and park honor the Swedish chemist Jacob Berzelius, one of the founders of modern chemistry.

The 19th-century home of Count and Countess von Hallwyl is now a museum.

Stockholm's deepest subway station is also a stunning ecological wonder.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

The scars of a remarkably organized public protest to save 13 elm trees are still visible in this Stockholm park.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

A concrete mushroom that divided Stockholm residents for nearly a century.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

Hidden in plain sight, Sweden's official ordnance datum is now abandoned.

This pair of unsuspecting buildings are in fact the very first modern skyscrapers in Europe.

There are hidden patterns on the subway seats of some Stockholm metro cars.