Very tightly controlled building regulations. No buildings over 3 stories high. Far from a concrete jungle, Sanibel is more like a jungle paradise. The average temperature here is a pleasant 74 degrees. Sanibel has over 15 miles of beach frontage and 5 public access.
Most accommodations have their own access.
Plenty to do, if you want to. Read a book at the beach, or just chill out at the pool. A perfect family destination awaits you. Named for Darling, a political cartoonist in the '20's ,who was ahead of his time as a conservationist. Darling used to visit Sanibel, and using his political clout, convinced the powers to be that this area needed to be set aside for future generations.