Cordillera Blanca
The white mountains
In Spanish, cordillera is a mountain chain or range and blanca means white. It sounds generic, until you get there and see the perennial white glacial peaks.
The Cordillera Blanca extends for 200 kilometers (124 mi) in a northwesterly direction. It includes several peaks over 6,000 meters (19,690 ft) high and 722 individual glaciers. Peru established Huascarán National Park in 1975, which covers 340,000 hectares. In 1985 it was made a UNESCO World Heritage site.
Practicalities
These are serious mountains that require experience in mountaineering and professional guides to get to many places. There are some day hikes that any hiker can do after they acclimatize to the altitude.