If the thought of exploring a cave is intriguing, and your clients would rather skip the water, then recommend they head to Florida Caverns State Park near Marianna, whose above-ground limestone caves feature spectacular stalactites, stalagmites, flowstones, columns and other formations that took thousands of years to form. Guided tours take them deep into the caverns, and there’s a visitors center with exhibits. But if the water is calling, the Blue Hole Spring is nearby.