Factual error: In the scene about driving to the guest house in Rodanthe, Dr. Flanner is depicted crossing a large bridge after taking a ferry. This is impossible. There is no large bridge of any kind between the ferry on the southern coast of Hatteras Island and Rodanthe, located to the north, mid-way on the island. The bridge shown was actually the Herbert C. Bonner Bridge, a two-mile span connecting Hatteras Island to the northern Outer Banks, which is the direction the character was headed, meaning he went past Rodanthe several miles earlier. Maybe he missed it in the fake sand storm.
Factual error: The scene in which the wild "banker" ponies run by the main heroine and her friend could not have taken place in, or anywhere near, the Hatteras Island village of Rodanthe. There are no wild h orses on Hatteras Island. To see wild horses on the Outer Banks of North Carolina, one needs to leave Hatteras Island and travel sixty miles north to Bodie (pronounced 'body') Island and the beaches near the village of Corolla (pronounced 'cor-allah'), or south fifty miles to Ocracoke Island and the pony pens administered by the National Park Service.