According to the Unesco World Heritage website, there is probably no ancient archaeological site anywhere in the world that has more relevance on today's world than Olympia.
Approaching the archaeological site, you will cross a bridge over the Cladeus river. The riverbed remains dry for most of the year now but in ancient times it was one of Olympiads vital rivers. You enter the sanctuary on the north side and proceed along the length of the Gymnasium which has not yet been uncovered in its entirety. The hill of Cronus at whose foot lay the sacred precinct, bound the site on the north. Outside the sacred precinct were the athletic facilities and visitors accommodations. The southeast section of the site that contained the Hippodrome has been washed away by the waters of the Alpheus river.
The best way to get the most out of your visit is to actually race in the stadium like the athletes used to do and feel the vibes!