Lake Titicaca, Bolivia - 18 May 2018 A majestic view of the Bolivian Andes, seen from the Island of the Sun on Lake Titicaca. Actually, the mountains are part of the Cordillera Real, a local sub-range of the great mountain chain. Dominating the vista is the great double - peaked, mountain of Illimani at 6,438 m (21,122 ft), which looms mightily over La Paz city.