Yalova's useful sights sit in a loose line from the waterfront into the hills. Start in town with Yürüyen Köşk, Ataturk's small seaside mansion, then head southwest toward Termal for hot springs and forested slopes.
With a car, continue to Su Düşen Şelalesi and the Green-Blue Road. Without one, keep the day simpler: ferry, waterfront, mansion, dolmuş to Termal, and a slow soak before returning to the city.