Termal
A popular spa since Roman times, Termal is a good stop if you're en route from Yalova to either İznik or Bursa. The springs were used by the Ottomans, refurbished in 1900 by Sultan Abdül Hamid II, and regularly visited by Atatürk in the 1920s and 1930s. Termal is a self-contained resort with three hotels (Çamlık, Çınar, and Termal), exotic gardens, a huge swimming pool, and four historic bathhouses that have many options for soaking in the mineral-rich waters. The baths are open to non-hotel guests, and private family bathing cabins can be reserved for an extra charge.
Avoid summer weekends, when the place is absolutely packed, and the crowds will probably outweigh the baths' relaxing properties. Besides, the hot baths are more appealing (and the rates cheaper) in other seasons. Also consider a walk in the pine forests, where you can enjoy a packed lunch.
