Castello Aragonese
2–3 hrs · Paid — €15 full, €6 ages 10–18, €12 over-70s, under-9s free
Ischia's icon: a fortress-topped tidal islet of trachyte rock reached by a 220-metre stone causeway, fortified from 1441 under Alfonso V of Aragon. Inside are the cathedral, Clarisse convent terraces, a Bourbon prison and belvederes hanging between sky and sea — twenty-five centuries of island history on one rock.
Moderate — ramp climb plus stepped interiors
Open daily 9:00 to sunset (last ticket 90 minutes before closing). Closed for annual maintenance early January to early March.
