"Onda es un municipio y una localidad de la Comunidad Valenciana, España. Perteneciente a la provincia de Castellón, en la comarca la Plana Baja."
"Onda is a town in eastern Spain, in the province of Castelló, part of the autonomous community of Valencia. It has 25.362 inhabitants. The Sitjar dam, located close to Onda, is an important feature for the irrigation of the nearby fields with water from the Millars River."