Quake

The first level in the remaster includes a new (to me?) part of the map and I can't find anything written about it at all. It's to the left of the main corridor; you can jump out the windows and find some more crashed rescue pods.

Thought I was going crazy (I played this game a lot many years ago) but booted up the 'original' game and it's not there.

Are there other changes to levels in this remaster? Or maybe this existed before in some other version I'm not familiar with?