They are located north of Australia and east of Bali and offer stunning tropical scenery, a remarkable history, friendly villages, and some of the globe’s most pristine, biologically diverse coral reefs. The only way to reach them is to island-hop the Indonesian archipelago by small planes, ferry services, or eco-friendly cruises for serious divers but it is more than worth the trouble.
I think that’s a great plan. Santorini is a must and Milos and Naxos are two islands that have both great beaches and lots to do and see away from the beach. Renting a car and exploring the interior villages of Naxos is a must-do and so is a boat tour around Milos. If you’re willing to cut Athens to 2 days, I would recommend Santorini 5 days, Milos 3 days, Naxos 3 days, and Athens 2 days.