The Francis Beidler Forest is an Audubon wildlife sanctuary in Four Holes Swamp, a blackwater creek system in South Carolina, United States.

It is the largest virgin stand of cypress-tupelo forest in the world, with some Bald Cypress trees over 1,000 years old.

[2] In 2020, Four Holes Swamp was designated a site on the National Park Service's Underground Railroad - Network to Freedom program.

It has an environmental education center and a 1.75-mile (2.82 km) boardwalk trail through the old-growth portion of the swamp, established in 1977.

During the spring, there are guided canoe trips in the swamp, which offer a different perspective as one paddles through the shallow channels and among the cypress knees.