A volcano ash covered ruins and tree flanked trails await on this 4 hour san salvador tour to el boquern national park and the joya de cern discover the san salvadors rock star volcano affectionately known as big mouth on a hike on the forested trails of el boquern national park with your guide follow that up with a visit to the archaeological ruins of joya de cern a unesco world heritage site to learn what life was like in the 6th century