Photographs show different viewpoints, dates and conditions. They do not establish current access to a particular route. Every image is credited below.
The Greek islands offer many different combinations of landscape, archaeology, villages and water. Choosing a small group with workable connections creates a richer journey than collecting names across the whole Aegean. A harbour and a hilltop settlement may say as much about an island as its most famous beach.
Build the trip around actual ferry or flight links and seasonal services. Allow a margin before the international journey home.