Including indirect and induced impacts, the industry contributes 4.5% of German GDP and supports 2 million jobs (4.8% of total employment).
[clarification needed] The history of tourism in Germany goes back to cities and landscapes being visited for education and recreation.
From the late 18th century onwards, cities like Dresden, Munich, Weimar and Berlin were major stops on a European Grand tour.
Spas and Seaside resorts on the North and Baltic Sea (e.g. Rugia and Usedom islands, Heiligendamm, the islands Norderney and Sylt) particularly developed during the 19th and early 20th century, when major train routes were built to connect the seaside spas to urban centers.
At rivers and close to natural landscapes (along the Middle Rhine valley and in Saxon Switzerland for example) many health spas, hotels and recreational facilities were established since the 19th century.
Since the end of World War II tourism has expanded greatly, as many tourists visit Germany to experience a sense of European history and the diverse German landscape.
Small and medium-sized cities often preserved their historical appearance and have old towns with remarkable architectural heritage – these are called Altstadt in German.
The table below shows the distribution of national and international visitor nights spent in each of the sixteen states of Germany in 2017.
[12][citation needed] This increase mainly arises from growth of cultural tourism, often in conjunction with educational or business travel.
Consequently, the provision and supply of more and higher standards of cultural, entertainment, hospitality, gastronomic, and retail services also attract more international guests.
Other cities and towns with over 1 million nights per year are Rostock, Hannover, Bremen, Cuxhaven, Bonn, Freiburg, Münster, Lübeck, Wiesbaden, Essen and Regensburg.
Berlin has a yearly total of about 135 million day visitors, which puts it in third place among the most-visited city destinations in the European Union.
The area of Reeperbahn in the quarter St. Pauli is Europe's largest red light district and home of strip clubs, brothels, bars and nightclubs.
Germany is home to several of the world's largest trade fairgrounds, and many of the international exhibitions are considered trend-setters or industry leaders.
Thousands of national and international trade fairs, conventions and congresses are held in Germany annually.