i remember seeing sun beating down on a truck in front of us with 80 or so residential sized gas tanks just banging on each other for the entire way from arequipa to lima, fun times. we did cuzco to puno then loop back to lima. there was news of coach fallen off the road on the bit from puno to arequipa, but then I was young and eager to explore so just jumped on anyway with a friend, good times for sure.