You will depart from Uyuni to the village of Colchani, to see how locals produce salt and enter the natural highway in order to cross over to Isla Incahuasi (2 hours). This is a special habitat for volcanic rocks and giant cactuses.
You will then continue north to the pre-Columbian Ayque Pucara fort and the nearby Chullpares in the foothills of the Tunupa volcano. The return to Uyuni takes 3 hours.