"A lowering thundercloud seems to erupt from Mount Singgalang, one of two volcanoes shadowing the bustling highland market town and tourist center of Bukittinggi. Dutch colonizers once made Bukittinggi their stronghold, aiming cannon from the heights of Fort de Kock into the town itself to preempt rebellion by the restive populace."
From "A Sumatran Journey," March 1981, National Geographic magazine