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

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

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

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

This luxury shopping lane has been protected by its own tiny police force for over a century.

This London plaque marks the spot where David Bowie's famous alien made his debut.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

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

The signs of a long buried road can still be found hidden beneath a London sewer grate.

This South London cemetery holds the remains of more than 15,000 people.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The celebrated eyesore created by starry-eyed sweethearts.

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

The final resting place of the "father of special effects."

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

The tomb of history's greatest potato promoter is surrounded by tubers.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.