The Odeon of Herodes is a stadium theatre on the south slope of the Acropolis. It's still used for music festivals every year, having been restored in the 50s. How incredible would it be to be seated here during a concert? Epic.

Here's a panoramic view, which is not entirely accurate, but you get the gist, I hope.

Other panoramas: Boston from the Ebersol Suite at the Liberty Hotel + NYC's 30 Rockefeller