I am so high right now... higher than anywhere in the continental US

So I am pretty high right now, way higher than anyone in the continental U.S., and have been for a week or so. I am currently in Potosi, the highest city in the world, I dont remember its exact elevation but I think its over 4600 meters, which is ridiculously high... well over 15,000 ft. Its crazy though, I have not had any alititude sickness since coming to Bolivia. Sure its hard to walk up and down hills, especially with a back pack, and yes I get random head-aches at times, but then you just pop some coca leaves in your mouth with a licorice alkaloid and ZAM!!!! No altitude sickness, its pretty nice. I just got back from a three day tour of the Bolivian Salt Flats which were amazing, but actually reminded me of Death Valley and Southeastern California excpet uplifted 4000 meters. So stunning, I have to make this short cause I have dinner plans soon, but we saw an Emu, fox, crazy rabbit-like-thingy that looked like it was from another planet, lots of Flamingos, tons of Llama and Alpacas, and some amazing landscapes. I will try to post up pictures because words cannot describe the eerie beauty of the landscape. There were also tons of rock outcrops that we bouldered on that reminded me of the southwest. Actually Bolivia, thus far, reminds me a lot of the Southwest US. It is shocking really, find myself feeling at home here, especially becuase the people look and act a lot like Nepalis. This is a good thing though, becuase starting Monday I am going to volunteer with an organization called Condor Trekkers that leads trips in the Andes and gives allthe proceeds to street kids that we train to be guides. I cant express how excited I am to be settling down for a month or two and volunteering. Its nice to travel but I miss feeling productive and having a sense of community. I am not too sure how well I will do trekking at altitude though, its much harder than one would think. But I have been adapting reasonably well thus far. Ok off to dinner.