Floating island - one of the highlights of the trip, is located in Lake Titikaka. A lake at 3800m above sea level.
Today I started taking the pill for attitude sickness brought from Hong Kong. Still feel very easy to get tired, though, most of the places (except capital Lima) that I am going to visit is about 2000+ meters above sea-level. Attitude sickness will be the cost I have to pay. Though when look around, not many people need to pay this cost...
OK, back to the subject. Floating island, built by a tribes Uros. It was said they started living in the lake for escaping from enemies. With small boat first, and eventually becomes island. Under sun light, it feels like bed, a big one.