For sailors wishing to explore all aspects of this area, a two weeks cruising should be planned.
Starting from Athens, Epidaurus is a first place to visit, mainly for the archeological monuments which are very interested. Then heading to Poros you can stay on anchor in Agistri (Dorousa bay at the SW of the island) and Moni to visit the natural park. Beach taverns available at both places.
Perdika at the SW of Aegina is a nice port to berth for a night.
Leaving Poros, Hydra is the next port to visit. The port is small and crowded, so it is suggested to enter early, before noon if possible. Dokos island is nearby and you can spend an evening on anchor. Ermioni is next place to berth, a small fishing port but with remarkable local taverns and also a restaurant offering Mediterranean dishes.
Leaving this area you can visit Spetses to enjoy its cosmopolitan breeze. It is worthwhile to walk around the main port of Spetses to admire the traditional buildings of the village. Nice bays to anchor available at the SW of the island.
Porto Cheli , on the main land opposite to Spetses is a nice place for provisions , well protected by the surrounded coasts.
Leaving Spetses area, Nafplion is the next pace to sail. Nafplion was the first capital of Greece, with nice old buildings, castles to visit and many restaurants, bars etc.
A round trip in the area could be Athens, Epidaurus, Poros, Hydra, Porto Cheli, Nafplion, Spetses, Ermioni, Poros, Perdika and back to Athens.