[forester]

For Chalkidiki you can enjoy swimming in either 2 legs (peninsulas).
In the middle leg you have to visit "kavourotripes", "platanitsi", "kriaritsi" and any beach you cam find traveling from one place to the other. You have many-many choises for eating. Almost in any village you will meet. Try "5 vimata stin ammo" and "Par a thin allos" close to Sykia. Also you can go to Amouliani island, from Ouranoupolis.
If you choose the 1st leg (the 3rd is Agio Oros) you must visit Poseidi. It is a small peninsula itself and you have to walk on the sand (like beeing in desert). You have water and a small umbrella yourself. Nothing exists on it.
Everything east from Kalithea is amazing! The central part of the leg is the most crowded and does not attracts people like us (nature lovers). But it has amazing night life

Have good time in Greece!