Board a usual timber boat for a vintage caldera tour, quit for swims, discuss with the volcano
https://donovanvnct498.evergrovio.com/posts/santorini-vip-tours-vs.-santorini-luxury-tours-what-s-the-difference-2
Board a regular wooden boat for a vintage caldera travel, give up for swims, go to the volcano, and appreciate onboard experiences and snacks.