If you have more than three or four days to spend in Istanbul, consider taking a day trip from Istanbul to one of the surrounding cities or somewhere further afield.
Below is a list of some of the best day trips from Istanbul:
EphesusIf you're not daunted by the prospect of flying to and from Ephesus in one day, an Ephesus day trip from Istanbul is a great way to see the ancient city.
GallipoliFor lovers of military history, Gallipoli makes for one of the best day trips from Istanbul. Enjoy a visit to the historic Gallipoli battlefields, trenches, and tunnels for a day.
BursaThe historic city of Bursa makes for one of the best day trips from Istanbul. Visit the first Ottoman capital to see the historic sights of the Green Mosque and Tomb, the Grand Mosque, the Silk Market and the Covered Bazaar.
Iznik and NiceaIznik and Nikea are a great day trip from Istanbul. You can spend the day seeing the famous tiles and location of the first Ecumenical Council.
Black Sea BeachesFor sun worshippers, the Black Sea beaches make for one of the best day trips from Istanbul. Enjoy swimming and sunbathing for a day before returning to city life in Istanbul.