I have noticed some places and items located in inacessible places and I would to know if theres any way to reach them? 

1 - A staircase on a rooftop on Red Keep

Here's the image:

2 - A pile of gold behind a rock on the South Dungeon, near to the dragon that we face when we meet Kayelinth.

3 - A place that looks like a factory just below the Bitterroot Farm on main map.

P.S.: I'm really loving the game so far, waiting for scenes with Maide Louise and more with Lind...