Saklikent (Hidden City) Gorge is the second-largest (20 km-long) gorge in Europe, the longest and deepest gorge in Turkey, about a 40 minutes’ drive from Fethiye. It is a spectacular place, with sculpted walls soaring high above. Four km. of the gorge is walkable after April when most of the snow from the Taurus Mountains has melted and passed through the gorge on its way to the Xanthos River. Summer is the best time to visit as the canyon is deliciously cool and shady with cold water.
Tour operators in the coastal resort towns offer tours to Saklikent Gorge, often in conjunction with a visit to Tlos and the very lovely and relaxing Yakapark Restaurant (also Jeep safaris from Fethiye, I think). Some tour operators also offer canyoning trips to the gorge.
Outside of and tucked within the gorge locals have set up small restaurants with seating areas on wooden platforms suspended just above the rushing waters. These are a great place to kick back upon Turkish rugs and cushions with a beer under shady trees. Among other things on the menu, they offer delicious fresh trout. Outside of the gorge you will also find treehouse accommodation, small relaxed bars and river tubing. River tubing rides last from 45 minutes to about two hours, depending on which ride you join.
If you are continuing on to Tlos (about 4 km. northwest of Saklikent Gorge), you will also find small shady restaurants in the villages along the way, run by families that serve fresh, home-grown produce. Items on the menu include fresh trout and gözleme (Turkish pancakes filled with meat or cheese).