Flushing Meadows–Corona Park, an park, is the largest park in Queens. The site hosted two World's Fairs, in 1939–1940 and 1964–1965, and the park infrastructure reflects the construction undertaken for the Fairs. The northern part of the park contains Citi Field, home of the New York Mets of Major League Baseball; the field, opened in 2009, replaced the former Shea Stadium. To the south is the USTA Billie Jean King National Tennis Center which is the home of the US Tennis Open.