Luxembourg farms. Luxembourg has especially close trade and financial ties to Belgium and the Netherlands (see Benelux), and as a member of the EU it enjoys the advantages of the open European market. With $171 billion in May 2015, the country ranks eleventh in the world in holdings of U.S. Treasury securities. However, securities owned by non-Luxembourg residents, but held in custodial accounts in Luxembourg, are also included in this figure. Luxembourg has efficient road, rail and air transport facilities and services. The road network has been significantly modernised in recent years with of motorways connecting the capital to adjacent countries.
Tourism in Luxembourg the Netherlands, Belgium and Germany with substantial numbers from France, the United Kingdom and the United States. Camping is popular in Luxembourg, particularly with the Dutch, who camp for much longer than other nationalities, especially in the Ardennes and the Mullerthal. Bordered by Belgium, France, and Germany, Luxembourg has a population of over half a million people in an area of . A representative democracy and constitutional monarchy ruled by a Grand Duke, it is the world's only remaining Grand Duchy. The country has a highly developed economy, with the world's highest GDP per capita. Its strategic importance dates back