Poros is a volcanic island, formed through the union of two smaller islands, Kalouria and Sphaeria. It lies in close proximity to the Argolid, separated from the Peloponnese by an extremely narrow channel. Arhaeology buffs will want to visit the scant remains of the Sanctuary of Poseidon, 5km from the town of Poros on the road to the Monastery of Zoodochos Pigi. The Sanctuary is situated, like so many ancient temples, amidst the most beautifullsetting on the island. It dates to the 6th century b.c. and was the center of the Kalourian League, a maritime confederation formed by Ermioni, Epidaurus, Nafplio, Aegina, Athens and Orchomenos. It was also a refuge for the shipwrecked and persecuted. It was here that Demosthenes is said to have drunk poison after having been cornered by his enemies in 322 b.c. Built up the sides pf a small hill, the town of Poros has the blue woodwork and white walls so typical of Greek island architecture. Swimmers will find charming little sandy bays all along the way to Neorio, rimmed with pine trees down to the sea. The approach to the Poros by ferry is especially picturesque. Crossing to the mainland is made easy by dosens of little boats constantly transporting people from coast to coast. A visit to the Lemon Forest ( Lemonodasos ) is a favourite excursion from Galatas.