I recently noticed that I did not get the obs or exp xp from a place I've gotten before. I was a bit lower level than the levels for the area in the area list. So I have two questions now.

Is it always true that if you go somewhere and you're not right in the area levels that you won't get the xp?

If you do go when you're younger, does that mean you've ruined the place or can you go back when you are in the level range and get it?

I hate to think I not only didn't get just because I went and spent time somewhere, but that I never can now.