The crystalline Ichetucknee River flows six miles through shaded hammocks and wetlands before it joins the Santa Fe River. In 1972, the head spring of the river was declared a National Natural Landmark by the U. S. Department of the Interior. From the end of May until early September, tubing down the river is the premier activity in the area. In addition to tubing, visitors can enjoy picnicking, snorkeling, canoeing, swimming, hiking, and wildlife viewing. October through March scuba diving is available in the Blue Hole only (you must be cave certified). White-tailed deer, raccoons, wild turkeys, wood ducks and great blue herons can be seen from the river. Picnic areas, equipped with tables and grills, are available throughout the park. A full-service concession offers food, refreshments, and outdoor products from Memorial Day through Labor Day.