Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

The world's only museum devoted to the wonders of fluorescence.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Former hunting lodge of a duke who was an avid collector of impressionist works.

This innocuous-seeming building is actually the remnant of a major wartime brothel.

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

A surrealist timepiece by the artist of melting clocks.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

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

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

This 19th-century pub features stained-glass windows celebrating Victorian-era "champions."

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

The canine-themed book collection claims to be Europe's largest dog library.

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

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.