pizzaboy180: Baltimore's Nightmare ???
I actually finished chapter 2... will i be able to open them in the next chapters?
Baltimore's Nightmare questline is started by watching Baltimore's dream in the Harpy Queen's lair. Unsure if that requires you to follow Iorveth's path or not. Harpy Queen storyline is started at the bountyboard in the Inn of the city. The dreams themselves are related to saving Saskia, you need to find the most powerful dream and Baltimore's is one of them. I believe Roche's side bountyboard has completely different questlines.
Considering that you can't go back to the previous areas, no you can't.