Anyone went on a walking tour in Athens?

My girlfriend is organizing our next vacation and I can already guess with 100 certainty what would be her choice. Athens, of course! She has already been there twice and she is simply in love with that town (well, I hope I am still on top of the list in that category). So, anyone went on a walking tour in Athens? I know that is what we will be dong for sure!

It seems to me that you have never been to Athens before and that you are nervous for no good reason. First of all, Athens is a city from which democracy came, in its earliest form, back in the days where many democratic states like US, did not even exist! Also, it is a place where you can enjoy the famous Greek mythology on the spot and that is something worth walking around a while!