If you do get out of Athens (which I highly suggest) a visit to Maraton is a nice side trip. The site itself has so few people there that it's not overwhelmed by tourisits. However for it being the final resting place for the 192 Athenians who died in the battle of Marathon it is not well up kept and more information about the battle needs to be there. It would have been nice if they had built the museum closer to this mound because you have to get in a car to get from the museum to the mound. The price for the admission to the mound also gets you admission to the museum and at a very low price.