Castillo de Onda (O de las Trescientas torres) - Castellón

The Castle of the 300 Towers: Its legend claims that, in its heyday, this fortress had as many towers as there are days in the year, a myth attesting to its grandeur. The Poem of the Cid: Mentioned in the famous epic poem with the verse: "My Cid won Valencia, Onda, and Almenar." Papa Luna: It also housed Pope Luna and was temporarily used and controlled by the Knights Templar.