Now this is worth visiting. Built in 1961 by Luis Espinos Fontdevila, who loved to fish and hunt, as a private residence. Today it is a free visitor center for the national park, known as the Palacio de Acebrón, that explains the life of the people in the surrounding area -- how they farm the land, strip bark from the cork tree, and generally how they live. It is also at the start of the Charco de Acebrón Path, a 1 1/2 kilometer wooden walkway through the forest with signs to explain the plants and wildlife along the way. Excellent!
It is near the village of El Rocio, a wild west village with no pavement on the streets, just wooden hitching posts for the horses. See my previous entry about this interesting town.