[{SlideShowNav}] !!!Port at Santo Tomas de Castillo [{Image src='170gt.jpg' width='800' height='653' alt='Port at Santo Tomas de Castillo' class='image_left'}] [{SET customtitle='Port at Santo Tomas de Castillo'}] \\ Tree line near the port at Santo Tomas de Castillo [{GoogleMap location='santo tomas de castilla' zoom='14'}]. Santo Tomas is Guatemalas primary deepwater port and is the headquarters of the Guatemalan Navy.