Hi, we're doing our first trip to Turkey, staying in Istanbul for four and a half days. We've researched many of the big attractions (blue mosque, etc.) but would love to hear from people about any other less known but amazing things to see and do while there. In our experience, every place we've travelled to has some of these, but often you don't find out until you're there, and sometimes too late. We're not against going outside the city if reasonable. Thanks!!!!