The plunge pool is a surviving relic of a rowdy royal residence.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

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

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

This museum is dedicated solely to this millennia-old handheld cooling device.

The sculpture of the deceased cockatoo flops atop its personal plinth.

The world's largest collection of ship figureheads includes figures from legends and history alike, from Sir Lancelot to Abraham Lincoln.

A much-loved local landmark pays tribute to the shipbuilding past of this area.

Legend has it this gnarled old tree was planted by Tsar Peter the Great during his visit to London.

These morbid carvings remind churchgoers of the inevitability of death.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

One of Jeff Koons’s largest sculptures and his first commemorative work.

What looks like a normal building is really a hollow facade hiding a subway vent.

A melancholy jester sits on the grave of a famous 20th-century ballet dancer and choreographer.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

Paris' linguistic guide to the international language of, yes, love.

The celebrated eyesore created by starry-eyed sweethearts.

This bridge was constructed from the rubble of the infamous Bastille.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The video game-themed street art first popped up in the French city.

This banal Parisian entranceway is not what it seems.

A surrealist timepiece by the artist of melting clocks.