If you'd like to inject a little more culture into your getaway, put Fethiye Museum on your must-do list. Check for guided tours or just browse around at your own pace.
You'll soon discover why this Istanbul City Center museum is popular with travelers. If you're searching for other things to keep you busy, Blue Mosque, Hagia Sophia, and Topkapi Palace are in this area as well. They won't take very long to get to from Fethiye Museum.