Many of you have mentioned about exotic places with Tibet singled out frequently. You need to be in reasonably good health to travel to places at high altitude. You feel varying degree of discomfort, usually continuous headache and giddiness, and you need to buy oxygen canisters to help you if you cannot cope with this symptom. Shangril-la at about 3400m above sea level starts to give you minor discomfort and Tibet is certainly much worse. I personally know many people who had been to Tibet and was sick during the entire duration of the trip, some of whom had to be hospitalized in fact. Exotic places no doubt but can your body take it?