The settlement charter of Onda Historical milestone · Onda, La Plana Baixa, Castellón Image of Onda, not of the place itself. James I granted a settlement charter to the town that had changed hands several times between Muslims and Christians; it afterwards passed to the Order of the Hospital and to that of Montesa, until the residents bought back the jurisdiction in 1393. 28 de abril de 1248 Photo: Columbusalbus (CC BY-SA 4.0) What to see and do in Onda