30 km from San Félix on the road to Piacoa in the State of Delta Amacuro, you will find Los Castillos de Guayana, buildings built on rocky hills on the right bank of the Orinoco River during the colonial era to protect Santo Tomé de Guayana from attacks by pirates and adventurers who feverishly sought El Dorado, the most fabulous of our indigenous inventions that would drive the feverish minds of the conquistadors mad.