An aerial view shows a lake known as Kulong Biru (blue lake) in Koba, on the island of Bangka, Indonesia, May 2, 2021. Deposits in the mining hub of Bangka-Belitung have been heavily exploited on land, leaving parts of the islands off the southeast coast of Sumatra island resembling a lunar landscape with vast craters and highly acidic, turquoise lakes. Picture taken with a drone. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES TPX IMAGES OF THE DAY