Translation of awake in Spanish

All sorts of people were sitting in the restaurant, locals as well as foreigners. One could see that the city had some modern places too and that it was not the Vietnam we had imagined.
The city seemed to be small but busy and many building were new. It looked like a third world country village with four and five star hotels. The infrastructure was still bad, but one could see development.
At noon we continued to the Altiplano to visit some lakes and volcanoes. At 4000 meter above see level it became suddenly extremely cold and our heads started to spin. Altitude sickness?