Like all other antenna outgrowths of the Mandelbrot the main spire also has a kind of central point, it's just a bit harder to see since there are only two spokes in the period-2 antenna. The vanishing point at -1.543689 is one example of a location where both the Mandelbrot set and the accompanying Julia set converge to an identical shape. The nearby orbit dynamics look highly parabolic and somewhat familiar.