I figured this spot would give an interesting perspective. Old Chiang Mai lies inside a square with 2km sides, surrounded by a moat. On the interior lie remnants of the old (700 years) brick city wall, and the counter-clockwise road. Most of the wall is missing; plundered for its still useful bricks, or displaced by the objects of progress. The corners are largely still intact though, and don't seem to attract many visitors. Scaling a short stairway brings you to a parapet overlooking the moat and exterior (clockwise) road to one side, and the interior road (pictured) on the other. The corner is only ninety degrees, but the fisheye lens compresses the extreme angles so much the road almost looks like a hairpin bend. If it weren't for the obvious fisheye frame it might be believable too; geometric distortion of nonlinear subjects can be quite subtle.