An unassuming Swiss institution houses Europe's largest toy museum.

The smallest museum in Basel, Switzerland, is a two-foot-by-two-foot window in the door of a 600-year-old house.

This lesser-known Frank Gehry building houses a treasure trove of cinema history.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

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

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

Notorious artist squat renovated into legal studios.

Collection dedicated to brands, packaging and advertising.

This cheese shop also houses a museum devoted to Dutch dairy.

The "Prussian Versailles" that is as glorious today as when it was built.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

A striking symbol of the Bulgarian capital.

Op-art architecture designed for happiness.

The statue of a legendary giant who carried Christ and shouldered the world's sins.

The reconstruction of this prominent building fulfilled a long-written command.

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

The oldest housing complex in Riga is a mini timeline of architectural trends.

This free museum is building a collection of books that are banned, censored or burnt around the world.

Relics from an era long gone, sit idle outside this Estonian museum.

The oldest continuously operating pharmacy in Europe.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

Plaques celebrating Lithuanian writers freckle a wall of this picture-perfect path.