According to the ancient geographer Pausanias, in Greek Mythology Poros was the personification of abundance and wealth. He was the son of Metis, the personification of wisdom, and Zeus, The Supreme God.
The island of Poros is today a small island in the heart of the Saronic Gulf, near the islands of Aegina and Agistri. Since ancient times it consists of two islands, Sfairia and Kalavria (=good aura).
Kalavria is an island near the coast of Troezen in the Peloponnese of mainland Greece, originally dedicated to the god Apollo, who gave it to the god Poseidon, the god of the sea in exchange for Delphi. Kalavria is much larger than Sfairia, covered with abundant water, while Sfairia, which is actually a rock of volcanic origin, is much later than Kalavria and a result of the many geological changes that took place in the area.
Featured Image Credit: Greek island Poros, Licensed with {{self2|GFDL-with-disclaimers|cc-by-2.5}}, via Wikimedia Commons