Aia (pronounced eye-a) is a small village situated on the slopes of Mount Pagoeta in the Basque Province of Guipúzcoa, Spain. It is located 30 km to the west of San Sebastián and about 10 km inland from the coastal town of Zarautz. Aia is set amongst rolling green hills and lush green forests, and surrounded by some stunning mountain views. The town still retains its ancient character, with the large Church of San Esteban building as an impressive centrepiece.