The last Tsar of Russia constructed this private church just so he could attend services when visiting his wife's hometown.

This 18th-century folly is one of Europe's rare "garden mosques."

A geothermal energy project gone wrong is fracturing the city's picturesque architecture.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

This fascinating museum in an old water tower holds the world's largest collection of Vodou artifacts from western and central Africa.

An ancient monastery, a locked room, and a mysterious book heist.

This collection of French root art looks like an indoor fairy wonderland.

At this monastery, monks make raw-milk cheese and use excess whey to create methane that powers their hot-water system.

A rare, flower-shaped example of Brutalist architecture in Switzerland.