Tomaz Kastrun adds dragons to the edge of the map:
The algorithm is a fractal curve of Hausdorff dimension 2. One starts with one segment. In each iteration the number of segments is doubled by taking each segment as the diagonal of a square and replacing it by half the square (90 degrees). Alternating and doing the left and right function / direction to complement in order to get the shape.
Clickt hrough for the sample code and how the plot looks.