Split is the largest Dalmatian city, the second-largest urban centre in Croatia and the seat of Split Dalmatian County. The city is situated on the shores of the Mediterranean, more specifically the eastern Adriatic Sea, spreading over a central peninsula and its surroundings, with its metropolitan area including the many surrounding littoral towns as well. An important regional transit center, the city is a vital link to the numerous surrounding Adriatic islands and the Italian peninsula, as well as a popular tourist destination. Split is also one of the oldest cities in the area, and is traditionally considered just over 1,700 years old. However, recent archaeological research relating to the ancient Greek colony of Aspálathos (6th century BC) establishes the city as being several hundred years older.