Only found this thread later, so can’t really get a better screenshot.
Sparkfly Fen – Splintered Coast, north to where the vista is. I got the vista, then explored further up and fell down a small triangle opening. It looked as if it was meant to be open, down there I could walk around, but couldn’t get up anymore. Till I found another opening and I thought I was out, but there was a hidden barrier. That barrier is most likely the ceiling of the cave I’m looking at, but from my point of view there was no texture placed so I look right through it. That’s why it appears as if I’m floating.
