Madrid environmental, sporting, leisure and cultural interest. Madrid Río provides a link with other green spaces in the city such as Casa de Campo and the Linear Park of the Manzanares River. The main landscaped area in Madrid Río is the Arganzuela Park, covering 23 hectares where pedestrian and cycling routes cover the whole park. The Madrid Río cycling network covers some and is linked to other bike routes. To the north, Madrid Rio connects to the Senda Real, the Green Ring for Cyclists and the E 7 (GR 10) trail, which goes as far as the Sierra de Guadarrama mountain
Madrid sector employs 18.1% of all employees. Madrid attracts about 8M tourists annually from other parts of Spain and from all over the world, exceeding even Barcelona. Spending by tourists in Madrid was estimated (2011) at €9,546.5M, or 7.7% of the city's GDP. The construction of transport infrastructure has been vital to maintain the economic position of Madrid. Travel to work and other local journeys use a high-capacity metropolitan road network and a well-used public transport system. In terms of longer-distance transport, Madrid is the central node of the system of "autovías" and of the high-speed rail network (AVE), which has