Four Holes Swamp
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Four Holes Swamp is a small blackwater river that is a tributary to the Edisto River in South Carolina. The swamp rises in Calhoun County and flows 62 miles to the confluence, in an unusual braided pattern; it has no well-defined channel, but multiple channels that start and disappear, yet maintain a flow.
The swamp is the home of the Francis Beidler Forest a 15,000-acre nature preserve of virgin cypress and tupelo forest jointly operated by the Audubon Society and the Nature Conservancy. Some of the trees are over 1000 years in age, and the forest is the home of a number of rare or endangered species.