Whichever you put first attracts a bit more emphasis, so the seeing in the first case and the location in the second. The second is particularly likely when it continues a thought from the previous sentence, e.g. "Let's walk to the top of the hill. From there, we can see the mountains."

Yes, it is a difference of style. The first one is more common. The second one is more natural in some situations of contrasts where "there" is emphasized. For example (pointing your finger) - "From there you can see the mountains. From there you can look into the forest. From there you can see the castle." You could still use the first one in this case, but the second is more natural.

Yes.