Board a conventional picket boat for a vintage caldera travel, stop for swims, talk over with the volcano
https://finnvvmx823.quantlynix.com/posts/santorini-daily-tours-what-to-expect-and-how-to-choose-3
Board a normal wooden boat for a traditional caldera excursion, stop for swims, seek advice from the volcano, and experience onboard thoughts and snacks.