The Wireframe is literally a step-up above the User Flow, it starts to get serious fun with all these draft pages coming out into play. Apply the appropriate text fonts with contents, pictures or illustrations then prototyping comes, etc etc...
Again more adjustments tend to happen as it's more clearer to spot a mistake here than in the User Flow.
Now I wish I had more screenshots to show of my wireframe but unfortunately I got carried away with my assignment that I did not screenshot enough...