Caleb Smith began visiting as many neighborhoods in NY since, 'Over a Two Year Period he explored them systematically. He bought a Hagstrom map of Manhattan, which he laminated. As he walked, he marked off the streets with a black marker. He took notes and a lot of photos along the way. After about a year, he had made much more progress than he expected, and it seemed natural to extend the walk to the entire island. Eventually he walked over 700 miles.