Board a classic timber boat for a conventional caldera travel, end for swims, talk over with the volcano
https://dantectwt097.inkharbory.com/posts/one-day-santorini-tour-maximize-your-time-with-this-smart-plan-2
Board a normal wood boat for a conventional caldera excursion, give up for swims, talk over with the volcano, and appreciate onboard thoughts and snacks.