What is the physical place local of The Scarlet Ibis?

The Scarlet Ibis is set on a small, isolated island off the coast of South Carolina. The island is described as being surrounded by a "sea of reeds" and is home to a variety of wildlife, including alligators, snakes, and birds. The landscape of the island is both beautiful and dangerous, and it provides a fitting backdrop for the story of Doodle and his brother.