Parque Nacional Iztaccíhuatl Popocatépetl, Mexico

There are giant mountains in Mexico.

I got a little bit of altitude sickness from this adventure. Mexico City is already at an elevation of 7,350ft (2,240 meters), but that was not adequate preparation. We didn’t go to the summit of Iztaccíhuatl, but we did reach roughly 13,000ft (4,000 meters). I never felt disoriented or anything while I was up there, but I did feel crumby for a few days afterward.