 The Palace of the Underworld is entered via three step @-@ vaulted arches on the eastern side of the second terrace of the Acropolis . 
 The Palace of the Underworld is entered via three step @-@ vaulted arches on the eastern side of the second terrace of the Acropolis . 
Da Palace of the Underworld is entered via three step @-@ vaulted arches on the eastern side of tdasecond terrace of the Acropolis .