The Francis Beidler Forest is an Audubon wildlife sanctuary in Four Holes Swamp, a blackwater creek system in South Carolina. It consists of over 16,000 acres (65 km²) of mainly bald cypress and tupelo gum hardwood forest and swamp with approximately 1,800 acres (7 km²) of old-growth forest. It is the largest virgin stand of these trees in the world, with some trees over 1,000 years old.