"Built in the 4th century B.C.E., rebuilt for the first modern Olympic Games in 1896, and refurbished for the 2004 Athens Olympics, this horseshoe stadium now serves as the finish line for the Athens Marathon. For centuries, nude male athletes competed here in the Panathenaic championships. Follow in their footsteps by running around the track (fully clothed, of course), or admire the views from the Pentelic marble pews, which can accommodate 70,000 spectators.Just outside the top tier of the stadium is a dirt track through the pine forest that’s popular with local joggers—a very scenic and inspiring spot to stay fit while you sightsee."