150-year-old satirical tableaus made from stuffed frogs.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

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

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

An important example of architectural history slowly decays in the city center.

Cat art as far as the eye can see.

A floating cat sanctuary on an Amsterdam canal.

The house where the writer spent his formative years.

Building owners can take out tiles for free at this repository for historic building materials.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Museum devoted to the artificial language of Esperanto.

A silly medieval mural preserved on the side of a Viennese house.

Op-art architecture designed for happiness.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

The hallucinogenic center of the ancient world.

This famous archeological mystery may be an ancient example of movable type.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

Dine at a legendary after-hours joint frequented by David Bowie and Iggy Pop.

You've probably seen these distinctive orange-tiled columns on the big screen.