The J. N. "Ding" Darling National Wildlife Refuge is located on Sanibel-Captiva Road on Sanibel Island. "Ding" Darling was an editorial cartoonist who was an advocate for preserving land to protect wildlife. I think he would be proud to see what was named after him on Sanibel!
The refuge is part of the largest undeveloped mangrove ecosystem in the country. It is famous for its migratory bird populations and easy to explore by visitors. You can experience the refuge either by car, bike, tram or by foot. Three trails can be accessed off of the four-mile Wildlife Drive: The four-mile Indigo Trail, the quarter mile Shell Mound Trail and the quarter mile Wulfert Keys Trail. There is also a Visitor's Center with lots of exhibits and even an interactive area for kids.
I hope you enjoy this short video of the refuge and you get a chance to experience it for yourself!