Barranca near Cercedilla. This is a creative commons photo of the Sierra from Wikimedia as are the next 19 below. See more photos of another recreational area at Las Dehesas de Cercedilla.
Hiking in the Sierra.
Barranca near Cercedilla.
Valley of Fuenfria near Cercedilla.
Valley of Valsain.
Valley of Valsain.
Panoramic of the Sierra de Guadarrama.
Panorama from Siete Picos near Puerto de Navacerrada and Cercedilla.
Panorama of the Sierra de Guadarrama.
Panorama from the top of Mt. Peñalara.
Panorama of the Valley of Lozoya.
The large lake of Peñalara.
View of the Cabezas
Siete Picos more or less between Navacerrada and Cercedilla.
Panorama of El Espinar de San Rafael.
Puerto de Navacerrada with Siete Picos at top left. The
Camino Schmid below
starts out from the building at the right (see the ski slopes?) and goes towards the right and then around to the left behind the mountains in the middle.
Peñalara Lake. It's just a short walk from Cotos. There's a small train from Cercedilla, which passes through Puerto de Navacerrada, that ends in Cotos. The Renfe train from Madrid goes to Cercedilla.
The Valley of the Fallen
is undoubtedly one of the most beautiful places in the Community
of Madrid. If you get the chance, go visit it. See more: Valley
of the Fallen. See also The Valley of the Fallen Trail.
(MadridTeacher.com photo.)
Puerto Cruzverde (above El Escorial - the favorite
place of "easy riders")
The drive from Puerto Cruzverde to Peguerinos
(near El Escorial)
A Tourist Video of the Sierra.
Puerto Cruzverde (above El Escorial - the favorite
place of "easy riders") 
