About two hours outside of Mexico City, in the state of Puebla, towers Popocatépetl, the second-highest peak in Mexico at an elevation of 17,880 feet (5,450 m). Popocatépetl, a volcano locally known as “el Popo,” spends part of the year with a snow-covered peak. With more than 25 million people living within a 62-mile (100 …
