9. Mont Saint-Michel, France
The unique "town" built on an island is one of France's most famous landmarks, and each year more than three million visitors decide to choose Mont Saint Michel as their destination. Mont, as it is called, is also listed as a UNESCO World Cultural Heritage Site, more precisely, its bay. Interestingly, the island can only be reached during low tide, but fortunately, today is linked to the mainland by a bridge. The main attraction on the island is the hilltop Benedictine monastery on the island that is visited by more than 50,000 passengers each year. Visit the Museum of History with its collection of ancient weapons, paintings, sculptures and explore ancient prisons and branches (Mont Saint Michel used prisons during the reign of King Louis XI).