The very acid Ijen crater lake in the Ijen Volcano, Java, Indonesia, Southeast Asia, Asia

Sulfuric acid hot springs, Dallol, Danakil Depression, Afar Region, Ethiopia, Africa

A village named Muftaffabad Loni on the outskirts of New Delhi, India that specializes in recycling circuit boards from electronics. The boards are taken out of electronics in other areas of New Delhi. Some of the boards are burned, some are dipped in sulfuric acid to get the metals separated from the plastics.