Here’s a map of the Santorini island group so you can get a feel for the volcano/s and where I went on the boat tour.
Recommended sites to see and things to do that I didn’t: ruins of Ancient Thira (I did pop into the museum though), wine tasting, go to the white/red/black sand beaches, there are a few churches I missed, and too many recommended restaurants/bars/clubs to name.
I’m leaving on the ferry tonight at 1am in a comfy cabin to arrive in Rhodes around 9:30am. Big cheers for the Blue Star Ferry.