At 113 miles from tip to tip, Padre Island is the world’s longest barrier island. It’s home to the Padre Island National Seashore – the longest stretch of undeveloped barrier island in the world. Here, you can drive onto the beach and take a swim in the clear waters of the Gulf of Mexico. That's the city of South Padre Island on the horizon in the background. [image captured with a DJI Mavic 2 Pro drone]