This is a very nice walk through the gorge to reach a small waterfall and then return by the same route. You need to book ahead as only 300 people are permitted daily, 8 euro entry fee.The staff provide helmets for safety and give a short talk about the gorge. The route is not guided, the path is easy to follow and takes about three to three and a half hours. The path has both sun and shade, bring water and a light snack. There is a nice restaurant just outside the gorge to eat in afterwards. We got a taxi from el Medano to the gorge and walked back down to Adeje to get a taxi back to el Medano approx. 10 euro each way.