Any mountain trail here is sure to pass through Berber country. These indigenous Moroccans were pushed into the hills by Arab invasions centuries ago and have since perfected the art of living vertically in villages that cling to the cliffsides. Ambitious hoofers can take on North Africa's highest peak, 13,670-foot (4,167-meter) Jebel Toubkal, on a two-day walk-up. Bring lots of water and get acclimated: Rugged and remote, this isn't the place for altitude sickness. The closest trailhead is out of Imlil, south of Marrakech, on the road to Agadir.