(SPOILER)Yes, search out all the teleporters. Some will take you to places you cannot otherwise access. In the clouds above the area I posted you can find one of the two secret collectibles (see: question marked boxes in game credits)

But aside from these two non-story items there are a couple other things worth searching for. In the screenshot I jumped from the ledge, I didn't fall from the clouds. The ability to do that is a product of these other secrets.