I have been to Olympia two times. The first on a land tour and then on a cruise excursion. The first time, I enjoyed seeing this famous place. There were a lot of rock piles, which our guide told us might be used to recreate their original structure. On the second visit, eight years later, nothing had changed. Before my first visit to Greece in 1999, a friend told me that there are a lot of ruined ruins in Greece. He was right, but there are so many gorgeous structures to see near those ruins. Having been to many places in Greece, I personally would put Olympia pretty low on the list of beautiful places; but it does require one to visit to experience the famous grounds.
With you being in Corfu today, you should find many photo worthy places to visit.