The ABC islands are part of a region.
The ABC Islands is the colloquial name for the Alaskan islands of Admiralty , Baranof , and Chichagof in the northern part of the Alexander Archipelago , which are all part of the Tongass National Forest . ABC islands is a colloquial name for two archipelagos : The ABC islands are the three western-most islands of the Leeward Antilles in the Caribbean Sea that lie north of Falcón State , Venezuela .