Carowinds is a 407-acre (165 ha) amusement park located adjacent to Interstate 77 in Charlotte, North Carolina. Although it has an official North Carolina address, the park is located along the North Carolina-South Carolina state line, with a portion of the park also located in Fort Mill, South Carolina. The park opened on March 31, 1973, at a cost of $70 million. It is the result of a four-year planning period spearheaded by Charlotte businessman Earl Patterson Hall. Owned and operated by Cedar Fair, Carowinds also features a 27-acre (110,000 m2) water park, Carolina Harbor, which is included with park admission. The park has a Halloween event called SCarowinds and a winter event called WinterFest.