Actually, it is hard to show the peculiarity of walking through Manhattan in plain 2D pictures. You really have to come and experience this concrete canyon by yourself. Among those things that can hardly be captured by pictures are the disgusting smell (thanks to snackbars and trash), the disastrous condition of infrastructure, and the sheer size of (everything in) Manhattan.
Streets of Manhattan - 1
Streets of Manhattan - 2
Streets of Manhattan - 3
Streets of Manhattan - 4
A snackbar that can be found at every corner
Some road signs near Ground Zero
3rd Ave at night with some smoke coming from subway
Swiss Economist 