Hatuasa Hot Spring is a small local bathing spot outside Ambon, set away from the harbour city in the island's greener interior. It is the kind of place that makes more sense if you have your own transport or a driver and want to see something beyond forts and beaches.
Expect simple facilities and a local atmosphere rather than a spa. The appeal is warm water, forest, and the change of pace that comes from leaving Ambon's busy waterfront behind.