First things first: legit two blocks from the flat is a souvlaki place called Elvis. Go to this place. Five euro or less for some of the best food I've had in a while. Then, go around the corner from Elvis and hit up Rakor, an awesome sit down restaurant with a great vibe and tasty food, all for less than ten euro. Try the housemade lemonade with ginger and mint. Super good. After you have been suitably stuffed with delicious Greek food, the metro is a five minute walk away, or just walk the full 20 minutes to the Acropolis, or the Ancient Agora (probably my favorite part) and then check out some shops on the way back. Don't forget to take a seat in one of the MANY little cafe/bars along the path to take a break, people watch, and have a quick snack/refreshment. And do not forget to grab some gelato, there is a Ferrero rocher flavor, and it's fantastic. Athens has all sorts of cool museums and ruins, and the flat is in a great place. And on TOP of all that, Anna and Theo were not only prompt, super nice and friendly, and helpful as heck, they even helped us book a new room on our return trip because the original was under construction. 10 out of 10 would recommend and hope to do again