Green Cove Springs, on the beautiful St. Johns River, is often referred to as Clay County's best-kept secret. An early tourist capital of Florida, it drew many guests to its natural mineral springs in the late 1800's. Visitors traveling to the springs included Abraham Lincoln and Grover Cleveland. "The Spring" at Spring Park flows at a rate of 3,000 gallons per minute, maintains a constant temperature of 78 degrees Fahrenheit year round, and has a visible depth of 28 feet. A bustling seat of county government, the city is home to the Clay County Historical Museum and the Railroad Museum, which offer a look at the past, and many festivals and fairs such as the Clay County Agricultural Fair, Clay County Cracker Day, the Clay County Rodeo, and the Railroad Festival.