If you listen to the depths of your heart with an open mind, you may sometimes hear that wonderful call of the wild. You may actually feel a strong primal longing to be among the mountains, the water-falls, the wilderness, the bird songs and that magical fresh air. You may suddenly feel the urge to pick up your backpack, put on your trekking boots and leave for the nearest mountains. If you have never done it before there is always a first time for everything, and your first trek is...