The port of Bruges-Zeebrugge is one of the most important, modern and fastest growing ports in Europe. It is Europe's largest port for RoRo traffic and natural gas. It also is the world's largest port for the import and export of new vehicles. Tourism is also a major component of the economy of Bruges. Due to its pristine medieval city centre, Bruges has become a popular tourist destination. Annually about 2.5 million day tourists visit the city and in 2007 there were about 1.4 million overnight stays.