Kings Dominion is a theme park in Doswell, Virginia 20 miles (30 km) north of Richmond and 75 miles (120 km) south of Washington, D.C., off Interstate 95. The 400-acre (1.6 km2) park opened on May 3, 1975, and is currently owned by Cedar Fair and offers over 60 rides, shows and attractions including 13 roller coasters and a 20-acre (81,000 m2) water park. The name given to the park is derived from the name of its sister park, Kings Island, and the nickname for the state of Virginia, "Old Dominion".