Most Saronic day cruises run three stops and serve lunch on deck. This one runs four, Agkistri, Metopi, Aegina, and Aphaia's Grotto, with a sit-down taverna lunch in Aegina, not a buffet on deck.
The Calypso Kos is a traditional wooden gulet. Open deck, crew of four. You board at Flisvos Marina in Paleo Faliro, minutes from central Athens, no Piraeus traffic, and settle in with a filema: a welcome box of Greek products, coffee, and juice.
Agkistri is pine-covered and quiet, one of the least-developed islands in the Saronic Gulf. Metopi is uninhabited, no beach, no vendors, you drop into the sea directly from the vessel. In Aegina, lunch is ashore at a local taverna, with time to walk the harbour and find the island's famous pistachios. Aphaia's Grotto is a secluded cove below the ancient Temple of Aphaia that almost no other operator includes.
Unlimited drinks throughout, soft drinks, water, coffee, tea, beer, and wine. Boarding 08:00, departure 08:30. Back by 19:15.