The battle of Castellnovo between liberals and Carlists Historical milestone · Castellnovo, El Alto Palancia, Castellón Image of Castellnovo, not of the place itself. The village was the scene in 1836 of a bloody clash during the First Carlist War, in a valley that the bands crossed again and again as it was a natural passage between Valencia and the Maestrazgo. 1836 Photo: Joanbanjo (CC BY-SA 3.0) What to see and do in Castellnovo