Burguillo the swamp is formed with the waters of the River Alberche. The swamp occupies part of the municipalities of El Barraco, El Tiemblo and Navaluenga.
It is located between mountains, It is the view of the Sierra de Gredos the most spectacular.
Burguillo Reservoir is the oldest in Spain, opened in 1913, It is also the largest in the province of Ávila. In principle it was built to supply the towns of
El Barraco , El Tiemblo and Navaluenga , Later its waters were channeled for agricultural use, but the main function of this waterfall is electricity.
In the swamp various sporting activities are performed, There marina, and also a kayaking school.