since you have a good amount of days you can do the tour of Peloponnese. You can start from Pylos and the big sandy beaches of Kaifas, visit, Methoni & Koroni, move eastern to Kalamata, pass Kardamyli and finally reach Mani where you can find Limeni and Areopoli. It is a tour with lot's different views and experiences. I hope you'll enjoy this.