Indianapolis is a railway freight hub in the midwest, where Interstate 65, 69, 70 and 74 meet, and Interstate 465 is a circular highway. Known as the "crossroads of America", there is the Union Station of the National Railway Passenger Transport Company of the United States, which is one of the oldest union stations in the United States and still provides railway passenger services for cities such as Chicago. The only public transportation in this city is IndyGo Bus Company. In the center of the city stands a 1 10-meter-high monument to soldiers and sailors, which is surrounded by the central business district. The 37th floor JP JPMorgan Chase Bank Building (built at 1990) is the tallest building in this city. Other important buildings include the state capitol, the telephone building and the Indiana convention hall and exhibition center. There are institutions of higher learning in the city, such as Butler University and Indiana University-Purdue University at Indianapolis, among which Purdue University ranks 65th in the latest ranking of American journalism universities, as well as Indiana Art Museum, State Museum and Children's Museum (the largest children's museum in the world). The city's green area is more than 5,260 hectares, of which Yingxi Park is the largest municipal park in China. Yingxi Reservoir, built near the park, is the main water source for industry and residents in this city. Indiana University-Purdue University Indianapolis Joint Campus is the largest university located in the city center in the United States, with a large medical center and four major hospitals (Indiana University Hospital, Riley Children's Hospital, Visa Hospital and Veterans Hospital). To the west of the city is expressway, Indiana (located in Do-Jin Cha), where the famous 500-mile car race is held every year; The racing hall of the nearby Fermat Museum shows all kinds of racing cars since 1909.