Guys, I have just discovered this, and I have a feeling I might have world first, but there is a hidden achievement (feat of strength) available to demon hunters:
Interdimensional Glider
Have you ever noticed how Maldraxus really isnt that far north of Bastion? Well, I certainly did, so it occurred to me I might be able to bridge the gap between the zones.
First attempt, I was some way short, but I thought I could get further if I had sufficient elevation, so after a few hours of attempts I finally nailed it.
-Firstly, find the northmost point of bastion.
-Then double jump off northwards, and at peak height, use rocket boots, and hope it backfires by shooting you into the air. Yes, you need to be an engineer, and yes, the rng sucks as this wont usually happen and you will just fall to your death.
-When you do get this to happen, right at the peak of your rocket jump (you might need several attempts to get a feel for this), activate your gnomish well. If you again have rng on your side and get at least 5 successful useful before it goes on CD, you are now high enough at this point.
- Then you need to glide, and use fel rush on CD, immediately cancelling into glide when the charge finishes.
Rinse repeat for about 70 seconds, and now you will touch down just at the outskirts of Maldraxus, and you will get the achieve.
Enjoy this awesome feat of strength :).