Really this stadium is better known as the Panathinaiko and not as the Athens Olympic. The interesting part of this stadium is that everything is cast in marble, it is beautiful. When you enter they ask you for your language and you get an audio guide. In various parts of the stadium are numbers from 1 onwards. You have to go following them and activating and stopping the audioguide. It is very practical, I really liked the story without having to pay more for it than the basic entrance fee. I recommend to go on foot do not be scared because, it is on a big hill which is peaceful.