The Andes are spectacular, and the part I saw, at the base of Aconcagua was too rugged for my comfort. I find high mountains scary. I was also huffing and puffing just walking on a level surface, which is an unpleasant sensation at any age, but especially at 64. I was definitely the slowest guy in our little tour group of happy 25 year olds. “Are you Ok Mister?”