Aqueduct of Peña Cortada Monument · Calles, Los Serranos, Valencia The Roman aqueduct of Peña Cortada, also called the aqueduct of La Serrada or La Serranía, runs through the municipalities of Tuéjar, Chelva, Calles and Domeño, in the province of Valencia, and was declared a Bien de Interés Cultural (Spain's highest level of heritage protection) in 2004. It is estimated to have extended some 98.6 kilometres between La Serranía and Sagunto or Valencia, making it the longest Roman aqueduct on the peninsula, although only 28.6 kilometres of remains are preserved. It combines stretches of bridge and channel cut into rock; in Calles stands one of its most spectacular elements, the three-arch bridge over the barranco de la Cueva del Gato, 36 metres long and more than 18 metres high, after which the conduit crosses the almost vertical cliff face that gives the whole complex its name, Peña Cortada. Photo: Falconaumanni (CC BY-SA 3.0) What to see and do in Calles