Halkidiki is so big that you can't see all of it in a week or two. We have been there three times and still we discover new amazing places to see. You definitely need a cat to get around. The roads are very good and petrol quite cheap. This year we stayed in Ouranoupolis. If you go there, rent a boat and go around the beaches. Amouliani island is the best. Also, from 10 o'clock, there is a boat that takes you to the Donkey island, where there is a very nice beach and the water is fabulous. And do not miss the trip around Mount Athos. Just one thing: get rid of the stary dogs! There are too many and they invade the taverns where you are eating, the beaches! This was a very big problem as in our group were some kids who were really scared of dogs!