There are numerous rumours about best istanbul turkish Bath but i can write it down most well-known and top-choosen ones as below;
VEZNECILER TURKISH BATH
Built in 1481, located in Edirnekapi area where opposite road to Chora Church.
taksi takes 10-20 Tl from old city area, 20-30 tl from taksim area. (depends on traffic jam)
Çemberlitaş Turkish Bath
built in 1584, located in center of Sultanahmet district, opposite of Circled Column.
Cagaloglu Turkish Bath
built in 1741, located in Sultanahmet area, in between of Nuruosmaniye Mosque and Basilica Cistern.
Kılıc Ali Pasha Turkish Bath
built in 1580, located in tophane area, in opposite of Tophane tram stop.
taksi takes 20-30 tl from sultanahmet area, 10-20 tl from taksim area.
Hurrem Sultan Turkish Bath
built in 1556, also known as Ayasofya Hamami(turkish bath), located in front of Hagia Sophia Museum.