NUBRAThe tour starts at around 9 in the morning. The cars, normally pick you up at the hotel/hostel. The first stop is the South Pullu checkpoint and by now the air is pretty thin. (Carry plenty of water; I had carried 4 litres of water and chocolates) The mountain sickness hits some people now. Not to fear as there is a health care centre here where oxygen levels can be monitored and if found low(less than 35) you can be given some oxygen so as to get it up. Works magically.