Hexagonal shapes, Salar de Uyuni salt flat, Altiplano, Ptosi Department, Bolivia, South America

altiplano america american american arid bolivia countryside crystal crystals de department deposit deposits desiccated dried dried up exterior exteriors flat hexagonal hexagonal lake lakes landscape landscapes mineral minerals nature outdoor parched photo photos ptosi ptosi salar salt salty scenery scenic scorched sear sediment sedimentation sedimentations sediments sere shapes shot shots south south structure structures surface surfaces up uyuni withered