Scattered throughout London are ancient remnants of the city's former bounding wall.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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

Amsterdam's Red Light District leaves little to the imagination.

These public toilets also provide entertainment for visitors to Amsterdam’s Red Light District.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

Granting the right of way to ships over surface traffic since 1917.

Always a new use for this old building.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

This 22-acre botanical garden is home to the largest collection of rhododendrons in the world.

A wall of chewing gum moonlights as collective art.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

This former coal gasification plant found a curious second life as a popular public park.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A walk through the historic city center, under the streets of Seattle.

A giant Troll lurks under one of Seattle's oldest bridges.

The celebrated eyesore created by starry-eyed sweethearts.

Indents in the pavement are all that remain from a grisly death machine in Paris.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

This modest marker near Notre Dame identifies the very center of Paris.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.