Salar de Infieles, Salt flat beach in Atacama Region, Chile.

Salar de Infieles is a salt flat covering 6.7 km² of a 293 km² basin at 3,520 m elevation, east of Taltal near Chile's border with Argentina in the Atacama Region. Its surface lies in a high, arid basin receiving about 100 mm of precipitation a year, where potential evaporation reaches 1,100 mm and the mean temperature is 2 °C.

This salt flat formed millions of years ago when ancient lakes dried up and left behind mineral deposits. These geological processes created the white layers visible across the landscape today.

The name Infieles ("infidels") was given by Spanish-speakers to the salt flat near Chile's border with Argentina, in the eastern part of the Atacama Region. The area around Taltal remains thinly populated; the sources record no present-day settlements or traditions tied to the flat itself.

Visitors should bring plenty of water and strong sun protection, as the sun is intense in this area. Clothing should be warm, as it can get cool in the early morning and evening despite daytime heat.

The salt surface displays natural patterns that shift with the seasons, revealing different mineral compositions. These changing colors give each visit a different appearance and make this place a constantly evolving sight.