Board a ordinary picket boat for a vintage caldera tour, quit for swims, go to the volcano

https://birthdaywishesstar.com/santorini-tours-how-to-choose-book-and-get-the-most-from-your-island/

Board a common wooden boat for a traditional caldera travel, discontinue for swims, consult with the volcano, and have fun with onboard reviews and snacks.