Piazza Grimana is a little public square about a block and a half away from Amanda and Meredith's cottage. There is a basketball court to the South of the square. There are 3 park benches on the East Side of the Square and 3 park benches on the West Side of the Square. It is here that the Curatolo, a homeless heroin addict testified that he saw Amanda and Raffaele hanging around watching the cottage gate.
There are many problems with his testimony besides the faculties of a man who fully admits that he was under the influence of heroin that night.
There is the logic of why Amanda and Raffaele would hang out around this basketball court on a cold November night instead of staying warm in the cottage or Raffaele's apartment?
And of course there is the fact that Amanda and Meredith didn't speak or text each other that day so it is unlikely that Amanda knew Meredith's location or plans.
And lastly. You can't see the cottage gate from anywhere in the square. Buildings and the ground block your view. You would have to stand in about a 10 foot by 10 foot area on the basketball court, not the Piazza to get a view of the cottage gate and that would be a peek a boo view at best.
As you can see by these pictures. Amanda and Raffaele would have had to have been frozen to this one small spot on the basketball court, not the square, or the park benches to watch the gate. Remember they don't know if Meredith was at the cottage, or away from the cottage. They are clueless to Meredith's location, so why would they watch the gate from this spot for 9:30 to 11:30 on a cold dreary November night? Also look at the last picture. They would be able to see Meredith for maybe 20 seconds at most and only if they were looking from this spot and they didn't look away.