Santa Laura Salpeter mine, UNESCO World Heritage Site, Atacama desert, Chile, South America

santa laura salpeter mine atacama desert chile unesco world heritage abandoned buildings rusted dilapidated desolate landscape sand industry mining history ghost town heritage site south america travel architecture ruins structures remnants past forgotten dry arid barren remote outpost civilization extraction resource minerals nitrates sodium nitrate chilean desert desert landscape outdoor daytime day clear skies blue sky horizon horizon line ground earth dust dirt wooden buildings