From Smithsonian Magazine:
The worse it gets, as I wade and stumble through the Great Dismal Swamp, the better I understand its history as a place of refuge. Each ripping thorn and sucking mudhole makes it clearer. It was the dense, tangled hostility of the swamp and its enormous size that enabled hundreds, and perhaps thousands, of escaped slaves to live here in freedom.
We don’t know much about them, but thanks to the archaeologist hacking through the mire ahead of me, we know they were out here, subsisting in hidden communities, and using almost nothing from the outside world until the 19th century. The Dismal Swamp covered great tracts of southeast Virginia and northeast North Carolina, and its vegetation was far too thick for horses or canoes. In the early 1600s, Native Americans fleeing the colonial frontier took refuge here, and they were soon joined by fugitive slaves, and probably some whites escaping indentured servitude or hiding from the law. From about 1680 to the Civil War, it appears that the swamp communities were dominated by Africans and African-Americans.
Read the whole thing.