The Cordillera Blanca is the most extensive tropical mountain range on Earth, crowned by Huascarán (6,768 m) — the highest summit in the tropics — a wall of glaciated 6,000 m peaks above the town of Huaraz, dotted with electric-turquoise glacial lakes like Laguna 69.
It’s the trekking and mountaineering heart of Peru, and a serious test of altitude.