Italy per 1,000 people) and 4,015,000 goods vehicles circulated on the national road network. The national railway network, state-owned and operated by Rete Ferroviaria Italiana, in 2008 totalled of which is electrified, and on which 4,802 locomotives and railcars run. The national inland waterways network comprised of navigable rivers and channels in 2002. In 2004 there were approximately 30 main airports, including the two hubs of Malpensa International in Milan and Leonardo da Vinci International in Rome, and 43 major seaports, including the seaport of Genoa, the country's largest and second largest in the Mediterranean Sea. In 2005 Italy maintained a
Tourism in Italy the 17th century, with the beginning of the Grand Tour. This was a period in which European aristocrats, many of whom were British, visited parts of Europe; Italy, Greece and other Mediterranean places were amongst the most popular. This was in order to study ancient architecture and the local culture. The Grand Tour was in essence triggered by the book "Voyage to Italy", by Roman Catholic priest Richard Lassels, and published in 1670. Due to the Grand Tour, tourism became even more prevalent - making Italy one of the most desired destinations for millions of people. Once inside what would