In 1981 the first Polish expedition, based on topographic maps of low accuracy, considered that the Colca Canyon reached a depth of 3250m. This information was used for many years.
But in 2005, an expedition led by Polish researcher Andrew Pietowski performed several measurements using modern high-precision devices, including a "Global Positioning System” (GPS), obtaining accurate data on the height of this natural wonder.
And it was on the 24th of August, 2005, in the city of Arequipa, during a press conference, that they revealed that in the territory of Canco of the district of Huambo the profundity of the Colca Canyon reached 4160m on the north side and 3600 m on the south side.
Deepest Part of the Colca Canyon - Canco 4160m.
From "The Conquest of Rio Colca, The Worlds Deepest Canyon" by Jerzy "Yurek" Majcherczyk
This makes the Colca Canyon the deepest Canyon of America and approximately more than twice as deep as the Grand Canyon.
SOURCE: AUTOCOLCA (COLCA AND DISTRICTS AUTONOMOUS AUTHORITY)
VOTE FOR THE COLCA CANYON AS A NATURAL WONDER
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