Castle and walls of Xixona Monument · Xixona/Jijona, L'Alacantí, Alicante Remains of the castle and walls of Xixona, evidence of the Muslim past of the comarca of L'Alacantí: the Almohad fortress, known as the castle of the Torre Grossa, was built between the late 12th and early 13th centuries and was the original nucleus around which the present-day town grew, of which only ruins remain today. Photo: Alfredo Jerez (CC BY-SA 4.0) What to see and do in Xixona/Jijona