Piraeus is the main commercial and tourist port in Greece, active since the time of Temistocles (85 BC) has become one of the most important ports in the Mediterranean. Following the growth of Athens, Piraeus has become a sort of appendix to the city itself with which is connected by a metropolitan line. It is the boarding point for the ferries to the islands of the Aegean Sea and therefore the passing point of many tourists who are shocked by the industrial aspect of the area. In the main port there is a lively promenade characterised by the modern buildings of the maritime headquarters and the boarding wharfs for Italy and the islands. On the opposite bank there is the small peninsula of Eetionea closed in by the Tihos Kononos wall that in ancient times used to be an arsenal. South of the main port the Akti peninsula used to be one of Athens’ defence bastions and today is a residential area. East of the Akti peninsula, the harbour of Zea is an exceptionally repaired bay and one of the largest marinas in the Med animated by the presence of renowned restaurants and inns that specialise in fish and seafood. The boats to the Peloponnese and the Saronikos Gulf leave from here. On the north bank the lively Kanari square is the meeting point of Piraeus. On the southwest side a modern semicircular building houses the Naval Museum (closed on Mondays and Tuesdays and through the whole of August). Another small harbour is the ancient port of Mikrolimano that used to be named Turkolimano, today the small bay is used for small private boats and is surrounded by bars and restaurants. Interesting the underwater ruins from ancient defensive structures and outstanding the views over the gulf from Kastela, a hillock behind the port where there used to be the ancient acropolis.