The “round Hydra” is an all day trip with boat that you rent. You can visit the beaches for swimming in blue waters and have lunch on the beach.
One can also go by water taxi or the daily routes across the dependency from where can rent a car and visit the eastern Peloponnese archaeological sites such as the ancient theater of Epidaurus, the palace of King Agamemnon at Mycenae, beautiful Nafplion, two medieval castles or country of Theseus ancient Troezen, and the vaulted tombs of Magoula Galata. There is a small ferry boat which one can get from Galata to go to Poros and to visit the Temple of Poseidon.
Finally there is the opportunity for a day trip by flying dolphins, either in Poros, or Hermione, or even Spetses and Porto Heli. It is also worth mentioning that in July and August made trips by boat from Hydra for the Epidaurus festival.