Karangtang volcano has been more aktiv volcano since many years ago,thatsway this volcano called API SIAU ( siau fires ) and fire forever. you can see this volcano fires when you will be coming to siau island by night boat. alotof tourists comes for to enjoin this volcano and climb when the second top of this volcano was posible to climb.karangetang volcano has two tops, one of top is very aktiv now.
