Park as close to the end of the road 'Traverse Prat' as you can find a spot. There should be a tall residential tower at the end of the road. Hike in past the green gate, there should be an 'ancient' wall (maybe 7' tall) with some breaks. Take the dirt trail off the main dirt road that goes just right of the ancient wall. Follow the trail, trying not to branch off on any of the other smaller trails (like I did), for about 15 minutes. About halfway in, the trail breaks a little bit right away from the ancient wall. A small scramble should get you to the base of the cliffs.