Sierra Calderona (Altura side) Nature · Altura, El Alto Palancia, Castellón This side of the Sierra Calderona Natural Park occupies 1,686 hectares of the municipality of Altura, in the Alto Palancia district, to which are added other protected areas such as a special protection area for birds and a site of community importance. Its highest point is the pico Montmayor, at 1,017 metres, along with other elevations such as Peña Rubia (922 m), the Alto del Rejo (834 m) and the cerro de la Segadiza (915 m). The terrain, very dry and without permanent watercourses, is crossed by a network of ravines and ramblas divided between the basins of the Rambla de la Torrecilla, to the north, and the Rambla de la Escarihuela, to the south. It is crossed by the Vía Verde de Ojos Negros, fitted out for hikers, cyclists and people with reduced mobility. Photo: Wikipedia / Wikimedia Commons (CC BY-SA) What to see and do in Altura