The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

A museum of carnival attractions where you are invited to ride the rides.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Notorious artist squat renovated into legal studios.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

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

A kaleidoscopic warehouse-maze of handmade neon signs.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

A museum in the childhood house of a medical pioneer.

Museum dedicated to the terror regimes of Hungary.

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.