Doom Island sits just off Sorong's coast, a short boat ride from the main port. It is small enough to walk around in an hour and has a few beaches, a quiet fishing village, and a handful of war-era ruins. The water is calm in the channel, and the views back across to the mainland are pleasant.
Local boats make the crossing regularly throughout the day; you negotiate a fare at the harbour. There is nowhere to stay on the island and very little to eat, so come for a few hours rather than a full day. It is a useful escape if you are stuck in Sorong waiting for a Raja Ampat ferry.