Santorini or Mykonos?
This is a hard choice, but if we had to choose one it would be Mykonos by a hair length. We chose Mykonos over Santorini because Mykonos was more walkable with flatter streets. Although the streets are still quite narrow, we enjoyed the leisure strolls.
Because Greece affords you access to five main bodies of water: the Aegean, the Ionian, the Thracian, the Icarian and the Cretan seas, this makes Greece the top destination. Seeing it by boat is just one of the best options. For creative cruise options, see this link. #notsponsored.