Bridges

The World is divided into six kingdoms. Eldur (Fire), Vatn (Water), Loft (Air), Voxtur (Growth), Dokk (Darkness), and Ljos (Light). Between each kingdom is a physical opaque barrier. It goes up and down forever. Oh, did i fail to mention these kingdoms are on floating islands? Anyway, a young 17 year old boy was taking a walk in the woods of Voxtur one day, when he stumbled upon a wooden bridge overgrown with vines. About halfway down the bridge was the barrier. But it was transparent. And on the other side, another boy was staring back.