‘Sentoukia’ – Kings’ graves are located at Delphi mountain which is the highest point of the island. To get there you need to folllow the directions to Pirgos and then to ‘Sentoukia’. You will end up at an open space area where you should park your car and motorbike. From this point and on you can only walk (~20 – 30 minutes walk) and you reach the ‘Sentoukia’ area. There are four tombs carved into the rock. Probably, they are kings’ graves since they are at the highest point.
Opposite the ‘Sentoukia’ there is path that gets you to the Vathia Forest.
Good luck and be sure to have water with you and to wear a hat!