Puno is at 3,855 meters above sea level, it is a city and the major port on Titicaca Lake, the highest navigable lake in the world. Puno is an important point to stop between Cusco and La Paz - Bolivia, this is one of the main reasons to spend a night there. It has a fine main square and a beautiful Cathedral built in 1657, the market is always interesting, full of Indians, especially women behind piles of potatoes, fruits, and woollen clothes.