Ombilin coal mine

The Ombilin Coal Mine is a historic industrial site located near Sawahlunto, West Sumatra, situated in a narrow valley along the Bukit Barisan mountains roughly 70 kilometres (43 mi) northeast of Padang.

Coal was first discovered here in the mid-19th century by Willem Hendrik de Greve, with mining operations commencing in 1876. It holds the distinction of being the oldest coal mining site in Southeast Asia.