Guided trails of the Montejo Beech Forest Activity · Montejo de la Sierra, Sierra Norte, Madrid Image of Montejo de la Sierra, not of the place itself. The beech wood can only be entered on free guided visits with limited places, which set off from the Biosphere Reserve Information Centre in the village and follow three different routes: the viewpoint path, the hillside path and the river path. Photo: Cruccone (CC BY 3.0) What to see and do in Montejo de la Sierra