Terceira Island

Terceira is a volcanic island in the Azores archipelago, in the middle of the North Atlantic Ocean. It is one of the larger islands of the archipelago, with a population of 56,000 inhabitants in an area of approximately 396.75 square kilometres . It is the location of the Azores' oldest city, Angra do Heroísmo, the historical capital of the archipelago and UNESCO World Heritage Site; the seat of the judicial system ; and the main Air Force base, Base Aérea nº 4 at Lajesse, with a United States Air Force detachment.

A small number of hypogea were discovered on the island of Terceira, indicating a history of settlement that may date back 2000 years, and alluding to a presence on the island before the Portuguese.

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