The Olympic Games is an event inextricably linked to Greece, however today the Olympics may not be the first thing that comes to mind when someone thinks about Greece. The hype for Greece is around the Greek Islands, so many tourist spots on the mainland get forgotten or reserved for much older travellers who are more interested in the history of this magnificent country. Do not be fooled! Beautifully historic places such as the ancient town of Olympia are a must-add to the bucket list.
Our modern Olympic Games originated from Olympia in Greece. Many of the events have their roots here. Lonely Planet lists Ancient Olympia as the number 1 sight in Greece: https://www.lonelyplanet.com/greece.