I love New York. It's a beautiful city that has to be seen to be believed. I'll get back there one day, but for now we can all gather around and watch this amazing free-hand sketch of the New York skyline and marvel at the skill of artist Patrick Vale.
It doesn't say how long this took him, but from the looks of things I'd guess quite a while. He seems to be looking at a photo of the skyline and drawing it from there. It'd be quite a feat to draw from memory, I think.