Day 1 - Kassandra Beaches: Settle in around Sani or Possidi, spend the afternoon on the beach and evening at the marina.
Day 2 - Petralona & Olynthos: Morning at Petralona Cave, afternoon exploring Ancient Olynthos on the way to Sithonia.
Day 3 - Sithonia Coastal Drive: Loop the peninsula's coast road, stopping at Vourvourou, Karydi, and Kavourotrypes.
Day 4 - Mount Athos Cruise: Morning boat cruise along the Athos coastline from Ouranoupoli, afternoon at the Tower of Prosforios and nearby beaches.
Day 5 - Ammouliani & Thessaloniki: Ferry to Ammouliani for a relaxed morning, or swap for a day trip into Thessaloniki if you'd rather end with a city.