The castle of Ventimiglia (or castle of Bonifato) is an ancient four towers castle which was built at the end of the 14th century by the Ventimiglia family on the top of Mount Bonifato near Alcamo (inside Nature Reserve Bosco di Alcamo), Sicily, southern Italy.

[1] The castle was destroyed in 1243 by order of Frederick II; it was rebuilt by the Ventimglia family before 1391 at her own expense.

In 1779 the castle's ruins were inserted in the Sicily's Plan for the Preservation of Cultural Assets (Plano di conservazione dei Beni Culturali della Sicilia) by Gabriele Lancillotto Castello, prince of Torremuzza.

This tower is located on the north-west[3] and had a rectangular plan with walls 2.2 m thick.

It was the most important in the castle because, thanks to its impressiveness and position, this was a point of strategic sighting as they could check the road leading to the castle, as far as the entrance door,[3] situated on the south-west side.