St. Simons Island, recently named the third-best island in the country by AOL Travel, is etched with an elaborate network of scenic biking trails, which visitors can explore on a fleet of rental two-wheelers. A web of leisurely tracks weaves through the south end of the resort village, winding along the marshlands coast at East Beach and along the length of Frederica Road. Cyclists can also navigate the island's pearly beaches or traverse the popular airport trail. For a more demanding outing, a 12-mile stretch originating at the northern end of Frederica Road offers wide-open riding, panoramic views, and honey-coated speed bumps.A scenic, 20-mile drive south brings island hoppers to the Georgia Sea Turtle Center, a marine-turtle rehabilitation, research, and education center located on Jekyll Island. During guided tours, guests explore a host of exhibits on the islands' indigenous reptiles, illuminating the creatures' habits, human efforts to protect them, and findings from ecological and wildlife health research. In addition to sea turtles, the center also nurtures diamondback terrapins, river cooters, and gopher tortoises.