Board a ordinary timber boat for a vintage caldera tour, stop for swims, seek advice from the volcano
https://hectorgxdb833.evergrovio.com/posts/santorini-guided-tour-vs.-self-guided-which-is-right-for-you-2
Board a typical picket boat for a basic caldera excursion, discontinue for swims, consult with the volcano, and savor onboard tales and snacks.