The Köprülü Kanyon national park (Köprülü Kanyon Milli Parkı) makes a good full-day outing from Antalya. Many companies operate half-day rafting trips down the Köprülü River, allowing time for a stop en route for a swim and lunch. Be warned that in peak season up to 45,000 rafters a day are bussed into this area, making both the road and river very crowded places – serious rafters should look elsewhere.