The main reason why you come to Puno is to explore Lake Titicaca, which is what we did the following day. First our boat took us to the Ouros Islands, which are floating islands made of reed,a long grass-like plant that grows in the shallow parts of the lake. Local people have been building these floating islands since colonial times (to escape the Spanish), and many families do live there, but tourism is the main source of income these days. It is very touristy, no doubt, but if you can get past it, it is quite interesting. Following the visit to the Ouros Islands, we went to Isla Taquile, further in the lake. A few hundred families live on the island, and tourism is also its main source of revenue, but the views of the lake are just incredible.