Even on a tight schedule, Panathenaic Stadium (Kallimarmaro) earns the hours.
Allow 45 min–1 hour.
Walking out onto the track and standing on the winners' podium under tiers of gleaming white marble is a real kick, especially with the included audio guide and the Olympic torch displays. The catch: it's essentially one big photogenic bowl — once you've walked it, climbed the steps for the view and seen the small tunnel exhibit, you're done in under an hour.