On the way from Zagora to the desert (M'Hamid) you will notice relicts of an old tower overlooking the mountain pass.
To find the cache and to enjoy the overwhelming view park your car (or camel) at the given coordinates next to the N9 and make your way up to the very top of the hill. A zigzag path will lead you to the tower ruin. The path is steep and rough, but climbing is not neccessary.
Please respect the ruin as a historical monument and move only the small stone that covers the cache container. Do not destroy anything. Check the hint, it is very precise.
Warning: You are in a remote desert area. Make sure to have plenty of water with you and let someone know where you are going. Do not go alone. In a case of emergency helpers might need a long time to reach you.