My fiance and I are going to Prague for our honeymoon, but we have two 15 hour layovers in Istanbul. I've noticed that most attractions in Istanbul are only open 9AM to around 6PM, while our layovers are mainly occurring over night. What should we do with our very limited time? We both love art and history and are definitely planning to visit Hagia Sophia. We could also use some suggestions of things to do in the late afternoon/early evening. What is open then?Thanks!