The high-light of the trip from Arequipa to Chivay is the Mirador de los Andes at 16,066′. To prepare one’s body for the ascent, the guides recommend chewing coca leaves. They even stop at a mini-market on the outskirts of the city to give you a chance to purchase a bag of leaves (or coca candy). Then, when you are back on the bus, they demonstrate how to pinch off a tiny bit of ash, role it up in about a dozen leaves, and then stuff the wad into your cheek. You then mash it in place for a half hour or so to release the alkaloids in the leaves, one of which is a form of cocaine. (For a more in-depth discussion of coca and its role in Andean culture, see http://en.wikipedia.org/wiki/Coca.)
Coca tea is generally tauted by the guidebooks as being helpful in altitude adjustment, and it is readily available in tea bags in most hotels and restaurants. Several of the hotels I stayed in had bowls of loose leaves available next to their hot water urns. I’d been drinking it since my arrival in Peru; it was way better than Lipton. I also bought a bag of leaves and with my guides help, settled in for a half hour of masticating the wad while the van climbed ever higher on a wide, well-paved road. Later on, I used some of my leaves when ascending the highest pass on the Inca Trail. Since it is illegal to bring the leaves into the United States, I gave the remainder to my porters at the end of the trek.
At the mirador, the van stopped so we could take pictures. The view was, of course, fantastic, but it was difficult to enjoy for long as it was cold and the wind chill made it feel very cold, indeed. It was also difficult to capture the immensity of the view.

- The Andes from a height of 16,000′
The guidebooks all say this pass is one of the highest motorable passes in the world. But, is it? Currently, the highest is believed to be
Semo La in Tibet at 18,258′. Estimates of the Marsimik in India are rounded to 18,300′. For many years, the Khardung La (17,580′) in India was thought to be the highest, but modern GPS readings debunk that claim. There probably are others in the Himalayas that also surpass the Mirador de los Andes by over 1000 feet.
The exact altitude of Mirador de los Andes is also questionable. Encarta places it at only 14,660′.
And how does this pass compare to those in the American Rocky Mountains? Two of the highest passes I went over, admittedly in a 4WD vehicle, were Imogene at 13,114′ and Black Bear at 12,840′.

Imogene Pass at 13,114'
One difference between 13,000′ and 16,000′ is the presence of some form of vegetation.

The Rocky Mountains from 12,840'
A more interesting difference is in people’s feelings and behaviors when reaching such lofty heights. The following scene was taken directly across the road from the Andean lookout.

Apachetas at Mirador de los Andes
There were literally thousands of these apachetas covering the hillside. Some were just a few rocks piled up like a cairn; some were several feet tall; some were very artistic and created silhouettes of animals. Most were probably created by tourists who knew nothing about what apachetas mean in Peruvian culture, but how they felt standing in this place looking at the apachetas already in place motivated them to do something.
An
apacheta is a stone cairn or mound used to designate or “link up” to a place of power that is infused with refined energy. (Matt McGee,
Peruvian Shamanism, The Pachakuti Mesa) For a detailed discussion, including their meaning and how to build one, see
Build Your Own Apacheta.
On the other hand, we witnessed the following scene near the top of Black Bear Pass in Colorado.

An American Apacheta?