The greater Copenhagen area has a very well established transportation infrastructure making it a hub in Northern Europe. Copenhagen Airport, opened in 1925, is Scandinavia's largest airport, located in Kastrup on the island of Amager. It is connected to the city centre by metro and main line railway services. October 2013 was a record month with 2.2 million passengers, and November 2013 figures reveal that the number of passengers is increasing by some 3% annually, about 50% more than the European average.