Terpoatrea

Terpoatrea (Basque: Aterpuhartea; Killarne: Tiérmútræ) is the second-largest and second-most populous of the Duchy of Biscay's 23 islands. The island is approximately 18% the physical size of Santua, the duchy's main island, which is located about 25 km northwest of Terpoatrea. The majority of the duchy's other islands are located closer to Terpoatrea than Santua, with Terpoatrea itself Santua's closest neighbour. Terpoatrea's largest settlement and only city is Arrantzea, located by an inlet on the island's northeast coast; Arrantzea is the primary gateway to Terpoatrea, as it is home to the island's only commercial seaport and only airport. According to the December 2020 census, Terpoatrea had a population of 55,340, just under two-thirds of whom lived in Arrantzea.