If you look out at the horizon, you will see a line that looks like you could step right off the edge of the earth. Myths and legends have long explored the idea that the world is not a sphere, but instead, if you travel far enough, you’ll find an ending. What might be at that ending place? A cliff that falls into nothing, a shining castle, a gateway to another world? Or perhaps something as simple as a wishing well and a small frog.