The dominantly andesitic Mount Victory stratovolcano, forming part of Cape Nelson on the NE coast of Papua New Guinea, is covered by rainforest. The deeply dissected Pleistocene Trafalgar volcano is immediately adjacent to the NE. The summit crater is breached to the SE, possibly due to landslides. Several lava domes are present in the summit area. Four small cones are located on the SW side, and two others occur on the NE flank. The only observed activity was a long-term late-19th to early 20th-century eruption that was frequently seen by passing ships. Pyroclastic flows have destroyed several villages and caused fatalities, and reached the coast.