Semuliki National Park sprawls across the floor of the Semliki Valley on the remote, western side of the Rwenzori. The park is dominated by the easternmost extension of the great Ituri Forest of the Congo Basin. This is one of Africa’s most ancient and bio-diverse forests; one of the few to survive the last ice age, 12-18,000 years ago. While Semuliki’s species have been accumulating for over 25,000 years, the park contains evidence of even older processes. Hot springs bubble up from the depths to demonstrate the powerful subterranean forces that have been shaping the rift valley during the last 14 million years.