On day 10 of my 25 day road trip we drove to National Park Cotopaxi. Unfortunately as we began the hike to the refuge from 14000 ft. to 15000 ft and then on to the glacier, I had my first problem with altitude since arriving in Ecuador. My head began to pound and I started having tunnel vision, so we came back down. I’ll have to try and tackle that one again the next time I’m in Ecuador!