Altitude sickness might not be something you've had to contend with on many previous trips, but it's pretty much part and parcel of any adventure through Bolivia, Chile, Colombia, Ecuador, or Peru. In fact, many of South America's premier tourist destinations, like Cusco, Lake Titicaca, and La Paz, rise well above 2,500m (the typical threshold for altitude sickness). I wrote an incredibly detailed post on preven[...]