Architecture

The only boathouse Frank Lloyd Wright ever designed was also the only unbuilt structure in his famous Wasmuth Portfolio, until 2007.

The most impressive of Basel's three remaining city gates.

A standalone wonder amid the prairie badlands of southeastern Alberta.

The ruins of a hermitage constructed during the 12th century.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

A retro Yugoslav congress, cultural, and business hall built in the 1970s, with an iconic world clock.

Perhaps the only one of its kind, the nearly-forgotten site once held mortal (and rigged) gladiatorial games between tigers and imperial war elephants.

Two buildings named after their windows that make it look like a sea of television sets plastered to a wall.

This wooden mosque is one of the few remnants of medieval Poland's Muslim Tatar community in this deeply Catholic country.

This may be one of the most valuable Morris & Co. stained glass windows in Australia.

A UNESCO-protected spiritual seat of the Old Serbian Kingdom and Empire.

A brother statue swap has adorned this building's facade for centuries.

Hidden underground, a remarkable 10th-century bath complex survives virtually unaltered.

A 14th-century Serbian Orthodox church that was once converted into a mosque under the much-disfavored Ottoman Empire.

A must for film lovers in Madrid and home to the Spanish Film Library's projection space.

This mysterious tower is said to enshrine a dormant seven-headed serpent that once protected Vientiane from destruction.

A 1930s Art Deco swimming pool with a design inspired by grand ocean liners.