If you do not feel like doing the two day trip to Effesus and Pamukkalae (which is what I would suggest) then you must do the day trip. Situated approx 3 hours drive from Altinkum you go to this wonder. It is absolutely fantastic to walk in the warm thermal waters and to swim in it is even a better option. We did the 2 day trip and slept over in Pamukkalae at the most wonderful hotel that had a normal swimming pool, thermal bath and a jaccuzzi. So needless to say, we jumped from one to the other and had great fun in the process.