Maitara is the small, conical island sitting in the strait between Ternate and Tidore. It is uninhabited apart from a single fishing village on its eastern shore, and most visitors see it only in passing on the speedboat crossing. A short boat charter from Rum can drop you on Maitara for an afternoon of snorkelling — the reefs around the island are in good condition and visibility is usually excellent — but there are no facilities, so bring everything you need.
The island also features in the famous view that appeared on the back of the old thousand-rupiah note, with Maitara in the foreground and Tidore's volcano behind. The classic vantage point is from the hill above Ternate's Sulamadaha beach. For the price of a fish lunch, local boatmen will run you across for snorkelling at the Maitara reef and back.