Board a normal wood boat for a traditional caldera travel, stop for swims, visit the volcano
https://kylerlefc867.quantlynix.com/posts/how-to-find-a-tour-on-santorini-insider-tips-for-the-best-santorini-tours-2
Board a classic wooden boat for a vintage caldera tour, discontinue for swims, seek advice from the volcano, and have fun with onboard reviews and snacks.