While staying in the Normandy region of France this past summer, my husband and I drove to Mont St. Michel, a small island just off the coast of France. Today there is a long bridge connecting the mainland to the rocky land mass and it's Gothic Abbey built atop it. There are shops, gardens, high stone walls and a grand church. You can read about it's incredible history here.
It was low tide the day we visited. Groups of tourist were walking around the outer sandy area of the abbey. There were even a few people riding horseback along the sandy surroundings. And though it was cloudy and a bit rainy, the sites were still incredible. I'd love to return someday when the tide is high so I could see the grand rock and it's buildings reflecting on the water.