Board a usual picket boat for a conventional caldera journey, give up for swims, seek advice from the volcano
https://medium.com/@rothesrpgh/best-santorini-tours-from-cruise-ship-fast-track-shore-excursions-with-pickup-and-drop-off-42c82d8fe9f4
Board a ordinary timber boat for a conventional caldera journey, cease for swims, talk over with the volcano, and revel in onboard studies and snacks.