About
      20 kms. South of Rangdum stands the Pazila watershed across which lies
      Zanskar, the most isolated of all the trans Himalayan Valleys. The Panzila
      Top (4401 m) is the picturesque tableland adorned with two small alpine
      lakes and surrounded by snow covered peaks. As the Zanskar road winds down
      the steep slopes of the watershed to the head of the Stod Valley, one of
      Zanskar's main tributary valleys, the majestic "Drang-Drung"
      glacier looms into full view. A long and winding river of ice and snow,
      the Drang-Drung" is perhaps the largest glacier in Ladakh, outside
      the Siachen formation. It is from the cliff-like snout of this extensive
      glacier that the Stod or Doda River, the main tributary of river Zanskar,
      rises. 
Zanskar
      has the distinction of being the least interfered with microcosms of
      Ladakh, and one of the last few surviving cultural satellites of Tibet.
      Within the mountain ramparts of this lost Shangrila stand a number of
      ancient yet active monastic establishments. Some of these religious
      foundations have evolved around remote meditation caves believed to have
      been used by a succession of famous Buddhist saints for prolonged
      meditation in pursuit of knowledge and enlightenment.