Grayton Beach State Park in Santa Rosa Beach protects a beautiful stretch of Florida's Emerald Coast, where sugar-white sand dunes meet clear green Gulf water. The park regularly ranks among the top beaches in the country. Behind the dunes lie rare coastal dune lakes, a type of freshwater lake found in only a few places in the world. Visitors can kayak on Western Lake, hike the trails through pine flatwoods and dune habitat, and stay in the campground or in cabins near the beach. Entry is $6 per vehicle. Weekdays and off-season months are the best times for a quieter visit.