Katerina is an energetic and knowledgeable guide. We learned so much that we wouldn't have been able to get if we had done the tour on our own. The Acropolis wowed us and having Katerina explain everything enhanced our experience. Our tour through the museum made sense because of Katerina's logical sequence of historic events. We also appreciated her cheeky sense of humor. If you only do one tour in Athens, make it this one.