Board a natural wooden boat for a classic caldera travel, give up for swims, discuss with the volcano
https://elliotlzfx982.quillnesty.com/posts/best-santorini-tours-for-couples-romantic-sunsets-and-private-wine-tastings
Board a basic wood boat for a conventional caldera journey, quit for swims, go to the volcano, and enjoy onboard studies and snacks.