Board a ordinary wood boat for a traditional caldera tour, stop for swims, seek advice from the volcano
https://jeffreyyxlm604.inkharbory.com/posts/santorini-island-tours-from-oia-to-akrotiri-in-a-day-2
Board a conventional timber boat for a vintage caldera travel, end for swims, stopover at the volcano, and enjoy onboard reviews and snacks.