New Castle of Manzanares el Real New Castle of Manzanares el Real The New Castle of Manzanares el Real, also known as Castle of los Mendoza, is a palace-fortress erected in the 15th century in the town of Manzanares el Real (Community of Madrid, Spain), next to the Santillana reservoir at the foot of Sierra de Guadarrama mountain range. Its construction began in 1475 on a Romanesque-Mudéjar hermitage and today is one of the best preserved castles of the Community of Madrid. It was raised on the river Manzanares, as a residential palace of the House of Mendoza, in the vicinity of an ancient fortress that
Eresma River several streams forms the river. Most of these streams descend from the slopes of mountains like Peñalara, Siete Picos and Montón de Trigo. Its most important tributaries are Moros and the Voltoya that flow northward, passing through San Ildefonso, Palazuelos, and through the city of Segovia; which it surrounds in a closed meander. Eresma river then runs northwest, passing near Hontanares, Los Huertos, Bernardos, Navas de Oro, Coca and Villeguillo. It enters the province of Valladolid through Olmedo, Pedrajas, Alcazarén and Hornillos. Later it flows from the right into the Adaja in Matapozuelos. Eresma river has pluvio-nival regime, which means