The Acropolis Museum is organizing from July to October thematic tours of exhibitions with free entry for guests. "Dodona: the oracle of sounds", "The ancients and the future", "Sacred places of antiquity", are some of the themes.
http://www.thetoc.gr/politismos/article/mouseio-akropolis-prwtotupes-ksenagiseissto-mouseio-me-eleutheri-eisodo