Vantage point #1: Kinetoscope - Father Comstock's Gift of Prophecy
Hudson's tailor shop, to the right of the monumental statue of Father Comstock. You can visit this area soon after leaving the temple and entering the main square.
Vantage point #2: Kinetoscope - Beware the False Shepherd!
Alleyway explored just after crossing the draw bridge (the one that is lowered after the fair has ended).
Vantage point #3: Telescope
To the left of the gate where you've received a telegram from Lutece.
Vantage point #4: Kinetoscope - The Envy of all His Peers
Near the entrance to the fair, on the opposite side of where the vigors are being presented.