This is almost a classic-style image of Central Park - almost looks like winter. Looks like cool weathe, no people, etc. I grew up in New York, and so the image is quite evocative to me. The collapsed fence adds to the mood.
Some thoughts for you:
Overall, you have relatively good tonal separation and contrast - they might be improved, but more on this later. I enjoy looking at the tree, with its cultivated, flower-like shape and many branches. I also find the double circle of pond and walkway to be pleasing.
Things I find troubling are the blown-out areas of the sky, and the bulls-eye composition. I suggest you consider trying to recover a bit of the cloud cover in the sky (perhaps by compositing a darker frame with this one), or at least try the Recovery slider in Lightroom or Camera RAW.
Also, please consider that the tree is dead center in the image. This usually makes an image feel static, diminished movement or visual energy. If you had taken this shot from an angle to camera right, and put the tree frame left by the rule of thirds, you might find that the image would hold the viewer's attention more completely. This would also get away from the perfectly balanced view of the water on either side of the tree, which is a bit too constructed for me.
Overall, a very interesting image, perfect for black and white. Well done!
David Saffir
GuruShots Photo Critique