Because you can't spend your entire European vacation visiting -- or sleeping in -- every single castle or palace, we narrowed your medieval bucket list down to the continent's (and UK's) coolest 14.
France is home to all sorts of magnificent strongholds, but Mont Saint-Michel is one you don't want to miss. It fills up an entire island off the coast and is known for a stunning yet treacherous high tide (although that was helpful against assailants back in the day). During the Middle Ages, Mont Saint-Michel was a monastery and pilgrimage site but became a prison during the French Revolution. Today, it’s one of France’s most recognizable landmarks.