Incan ruins (possibly on top of pre-Columbian ruins)! (Below) The valley the ruins look out over. We're near La Mitad del Mundo, at the end of Quito's sprawl. Look how dry the area is. Interestingly, there are a lot of acia trees that remind me of the route out to Mombasa in Kenya. Most of the flat fields you can see are corn fields, and all of the houses are cement brick. On top of the walls (that have been restored) there's a lot of pumice stone, which is a volcanic rock that is full of air and weighs next to nothing.