You are in the South American highlands, somewhere between the mountain ranges of Bolivia and Peru, where the altitude of more than 3,000 meters imposes tough demands on the people to utilize the scant vegetation for their needs.
The inhabitants thrive by fishing in Lake Titicaca, mining ore, breeding alpacas, and trading goods that they produce from these resources. But the resources are limited and will eventually run out, so you'll need to build new production facilities and find new sources of income, like cacao. …