Dissolved minerals.
Madeleine Deaton — CC BY 2.0 · einalem from Leeds — CC BY-SA 2.0 · Diego Delso — CC BY-SA 4.0 · Carlos Adampol Galindo — CC BY-SA 2.0
A salt lake in Bolivia's far south-west at the foot of the perfect cone of Licancabur volcano, its water shifting between emerald green and turquoise from dissolved minerals such as copper and arsenic, the colour deepening when the afternoon wind stirs up the sediment. Beside it lies white Laguna Blanca, separated by a narrow strip of land, and the view from the shore over both lakes and the volcano, over 5,900 metres high, is one of the finest in the Andes. The volcano straddles the border, half of it in Chile. Near the lake are the Polques hot springs, where visitors soak in warm water in the morning with views over the plains, usually on the last day of the Uyuni tour, before some continue across the border to San Pedro de Atacama in Chile. The water is toxic, so don't touch or drink it. It is seen on 4x4 tours from Uyuni, most often the three-day tour, so choose a company with careful drivers and sound vehicles. The altitude is over 4,000 metres and nights are bitterly cold, often below minus ten, so bring winter clothes and a warm sleeping bag.
Dissolved minerals.
Next door.
Warm water.
Far south-west Bolivia on the Chilean border, Eduardo Avaroa reserve
Yes, some Uyuni tours end at the nearby border, with buses on to San Pedro de Atacama; bring your passport.