It's a hike to the Parthenon. I would say a good 30 minutes +. Don't quite remember exactly since it has been a few years but honestly, we really only walked to the center once or twice because despite the claims that it is a brief jaunt, it is long enough to get old quick. Although, EVERY cab ride requiring constant vigilance against scams and overcharging gets really old quick also, so dealer's choice I guess.