Famous for motorsports fans in all the world, the TT circuit was built in 1955 and, although originally longer, the track is now some 4,555m long. The sports arena can host some 100,000 spectators, and in fact does when the DutchTT in running. Usually held in June, this is the largest single day sports event in the country, drawing visitors from far and wide. Check the websites for any upcoming events, as there are events some 250 days of the year. After the track was shortened, a large area of land became available to develop the Circuit into a more full-fledged tourist attraction in Assen. Heavy investments are currently made to create a large scale leisure park around the circuit, including shopping and amusement opportunities.