Poros consists of two islands: Sphairia, the southern part, which is of volcanic origin (where today’s city is located) and Kalavria, the northern and largest part. The islands are connected by a bridge across the narrow dividing strait.
The land area is about 50 square kilometres (19.144 sq mi) and the landscape is very hilly and mountainous. Much of the northern and far eastern/western sides of the island are bushy, whereas large areas of old pine forest are found in the south and center of the island.
Apart from the lush vegetation and crystal clear beaches, Poros has a lively waterfront adorned with shops, cosy cafes and restaurants. The capital is very picturesque with grand traditional mansions and cobbled streets.
The main archaeological attraction is the Temple of Poseidon (built circa 520 BC) where Demosthenes, the Greek statesman and orator, committed suicide in 322 BC by drinking poison, when he was pursued over his part in Athen’s uprising against the rule of Alexander the Great, King of Macedonia.