If you’re planning to pop the big question in Miami and still considering ideas, here’s a couple that might be useful, or at least get your wheels spinning a little:
By Beach: You’ve got many options here from taking a walk on the beach at sunset (or even sunrise) to dining at one of the many restaurants on Ocean Drive.
By Boat: Miami’s port is famous for it’s cruises. Asking on a cruise is always romantic.
By Hotel: Perhaps spend the weekend at one of the many hotels in the Art Deco district of Miami. There should be one that fits your taste and will be sure to provide the ambiance to set the mood.