Los Órganos de Montoro Nature · Villarluengo, Maestrazgo, Teruel Natural Monument: a limestone formation of almost vertical layers that erosion has sculpted to look like the pipes of a great musical organ. It extends between the municipalities of Villarluengo and Ejulve, in the comarcas of Maestrazgo and Andorra-Sierra de Arcos, with an area of 187.6 hectares and an altitude ranging from 800 metres, beside the río Guadalope, up to 1,183 metres at the peña de los Órganos. It was declared a natural monument in 2010, one of five existing in Aragón, and it is made up of Upper Cretaceous limestone strata laid almost vertically, later shaped by karstification, with a verticality comparable to that of nearby Aliaga. On its crags, with sparse vegetation, cliff-nesting birds such as the vulture breed, and it is also home to the wild goat. Photo: Juan Emilio Prades Bel (CC BY 4.0) What to see and do in Villarluengo