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 The "walking on clouds" effect on Volcán Chimborazo, and other high mountains, occurs due to several factors related to altitude, climate and geography. 
 Is it flat ground?  
 The terrain at Volcán Chimborazo is not flat; in fact, it is quite rugged and steep, as is typical of volcanic mountains. Chimborazo is a stratovolcano, which means it is conical in shape, with steep slopes that vary in steepness as you climb.