Artist Jorge Colombo draws street scenes in New York using only his finger and the iPhone "Brushes" app. You might have seen his work on the cover of the New Yorker last year. In honor of his upcoming book of images of the Big Apple, here are some of his coolest cityscapes. We only wish our fingers could be so nimble.

"Jorge Colombo drew this week's cover using Brushes, an application for the iPhone, while standing for an hour outside Madame Tussaud's Wax Museum in Times Square." [New Yorker]