Andeans prepare their boats at the shores of a Uros island at Lake Titicaca in Puno November 5, 2014. The Uros islands are a group of 70 man-made totora reed islands floating on the lake, which according to Peru's tourism board iPeru is the world's highest navigable lake at over 4,000 meters above sea level. The Uros people fish and hunt, but tourism is their main source of livelihood. REUTERS/Enrique Castro-Mendivil (PERU - Tags: SOCIETY ENVIRONMENT)