Photography: Árbol de Piedra [The Rock Tree]

Árbol de Piedra (“rock tree”) is an isolated rock formation in the Eduardo Avaroa Andean Fauna National Reserve of Sur Lípez Province, Bolivia. Much photographed, it projects out of the altiplano sand dunes of Siloli in the Potosí Department, about 18 kilometres (11 mi) north of Laguna Colorada. Also known as the “Stone Tree,” it is shaped like a stunted tree, and is formed into a thin rock because of strong winds and the material is sand stone.