an abandoned underground tin mine in belitung island, indonesia

abandoned agriculture attraction background belitung bhpi biliton billiton broken coast colonial dangerous deep dutch earth environment fern field filled flower forestation gemeenschappelijke geology geopark geosite gepark grass green gunung heritage hill indonesia industrial island iton kikara landscape large laterite legacy maatschappij metal mineral mountain namsalu nature open preussag propriety pyrite reservoir river rock stone sulfide surface terrain tourist tree underground water waterway wetland