Clicking on the Rabbit's footprints opens a browser with a map of a region in Pennsylvania with 8 numbered markers.
The box symbol in the upper-left-hand corner corresponds to a skywriting clue.
The clue has a series of directional arrows:
Down, Left, Left, Down, Right, Down, Left
Start at the #1 marker. By following the directions to the points marked on the map, you end at the sixth marker. Zoom in and you'll see that it points to a town by the name of:
To next puzzle: Posters.