Burgh Island, Devon, UK would make a beautiful wedding venue. It's an original Art Deco Hotel set on a tiny island just off Bigbury on Sea. Low tide you can walk to the island, high tide you take a sea tractor. Agatha Christie wrote some of her novels here. A uniquely glamorous place.
Things to do in Istanbul – Visit the Pera Palace Hotel. Agatha Christie reportedly wrote Murder on the Orient Express during her stay here, and the hotel’s restaurant is named for her. http://mikestravelguide.com/things-to-do-in-istanbul-visit-the-pera-palace-hotel/