Castello Aragonese, the Castle in Otranto, sits at the entrance to the historic center. Although the original castle was built before the 15th century, the most recent restructuring is from the Aragonese period. The castle complex has been restored and is open to visitors. It often hosts art shows. There’s a small bookshop selling postcards and books.
Outside the castle you can walk up to the top of the walls for great views of the town and the sea.
It is believed that the first Gothic novel ever written, the Castle of Otranto written in 1764, was inspired by this castle.