I visited this WHS in June 2014. It's quite far from any other town or village, so this together with the fact that it was 39 degrees when I visited, must have kept the crowds at bay. From all the classical WHS I visited in Greece, this seemed to be the most vast and clearly distinguishable group of ruins. That said, what is left ruins but I found something interesting and different in almost every structure. The archaeological museum houses several ornaments, stone statues and bronze statues (most important is the winged Nike of Paionios) and it complements the archaeological site quite well. The main areas worth mentioning are the following: the Leonidaion and the Palestra (several lined doric columns in very good condition), massive ruins of the Temple of Hera and the Temple of Zeus with several inscriptions still visible, the workshop and thermal baths where there are excellent mosaic floors visible and marble carvings, and finally the impressive Ancient Olympic Stadium with an intact arched entrance and start and finish lines visible. I must say this is one of my favourite WHS in Greece.