Skypiea

Skypiea is a land located in the sky above the Grand Line. The people are unique in that they have small wings on their backs, similar to the stereotypical angel, though no use has been revealed for them. The daily life of sky people revolves around the use of Dials, which normally aren't available in the Blue Sea. As opposed to the beli of the rest of the world, it uses extols as currency. The people of Skypiea have a religious reverence for soil, because it can yield plant life much better than island cloud can, and also other materials that comes from the Blue Sea.