One of the largest existing medieval fortresses in Europe, Castillo de Santa Bárbara sits atop 545-foot-tall Mt. Benacantil. From this strategic position you can gaze out over the city, the sea, and the whole Alicante plain for many miles. Remains from civilizations dating from the Bronze Age onward have been found here; the oldest parts, at the highest level, are from the 9th to 13th centuries. The castle is most easily reached by first walking through a 200-yard tunnel entered from Avenida Jovellanos 1 along Postiguet Beach by the pedestrian bridge, then taking the elevator up 472 feet to the entrance. Guided tours (€3) are offered Monday–Saturday at 11, 12:30 and 5, and a "theatrical tour" (€5), with performers in costume interpreting the history of the castle take place on Sunday at noon from Mar. 17 to June 16—alas! only in Spanish.