At the eastern limit of the Sierra de Gredos, the Iruelas Valley opens its way, a unique territory of slopes covered by forests with a great diversity of species, with the black pines and the laricio the protagonists and where the largest colony of vultures is preserved. black from Castile and León with a census of close to 120 couples.

On the banks of the El Burguillo reservoir sits the old resin town of Las Cruceras, where resin and loggers lived in the middle of the last century. In what was an old resin factory and with views of the swamp, the Park House is installed, a beautiful educational and interpretation space of both the ways of life of the resin culture and the environmental values ​​of the nature reserve.