We tried to exit Bolivia through the only 4x4 accessible path to San Pedro de Atacama in Chile. We soon realized however that our van had no chance on such an extreme off road surface so we crossed a bit more north at a place called Ollague where we only got one flat tire. The desert was cold, harsh and breathtaking. Finally we got to the border where although the computers were on in the offices but no one was around. I had to walk from shack to shack knocking on doors to find an immigration and customs official.