A large flock of flamingos wading in Laguna Colorada, located within the Eduardo Abaroa Andean National Fauna reserve near the border with Chile, in the Uyuni salt flats, Bolivia. The Uyuni salt flats are estimated to contain 10bn tonnes of salt – of which 25,000 tonnes are extracted every year – as well as 100m tonnes of lithium, making it one of the largest global reserves of this mineral, according to officials at the Bolivian Mining Corporation. The salt flats are a major tourist attraction in Bolivia, with around 60,000 tourists visiting them every year to see various types of flamingos, giant cacti, geysers, hot springs, volcanoes and colourful ponds

Photograph: Martin Bernetti/guardian.co.uk