Popcatepetl (left) and Iztaccihualtl (right) as viewed from the Aztec ruins of Cholula on the east side of the mountains. December 1992. Apparently you can sometimes still drive in from the Cholula direction to Paso Cortez (between the two summits) when the normal route from the west and Amecameca is closed due to the eruptions. Sometimes, both routes are closed.