Sorry for using screenshots, but at the moment fraps is way too laggy for me and I don't know what else to use to record.
First of all you want to use a dark moon ride or Spirit of Bashiok if you're a rogue.
Start here https://i.imgur.com/6gasmin.jpg
Make sure that if you're using a darkmoon ride you are STANDING ON the small black platform of the unfinished tower! If you are using Spirit of Bashiok, make sure you are FACING the small black platform.
Next, swim around to https://i.imgur.com/Dzx7bAa.jpg
Jump into the corner until you get all the way up https://i.imgur.com/rqZjWlR.jpg
Once you're there, jump down to the lower level (DO NOT JUMP ALL THE WAY INTO THE PIT). Once there you need to jump onto the ramp as it is the ONLY solid part that you can walk on https://i.imgur.com/SOF819y.jpg
While the machine on the higher part of the ramp seems impassible, walk around the very edge of the left side of the ramp as there is a tiny path upwards. Use a remote controlled vehicle to find it and walk the path until you feel comfortable enough to walk it yourself.
Once on top of the ramp, use a remote controlled car and jump forward from the edge of the platform https://i.imgur.com/VKU3qCz.jpg
You will see some spots you can reach by jumping with a mount. https://i.imgur.com/mnhp2du.jpg
Eventually you will come here https://i.imgur.com/j3EYV0o.jpg
The tower to my left has a particular spike sticking out which I assume you can use a dark moon ride to bypass the invisible wall all along the zone.
https://i.imgur.com/q6ZZEdY.jpg
https://i.imgur.com/mWJt0pa.jpg
https://i.imgur.com/EYpoLXs.jpg
As I have no darkmoon mounts on this character, I'm unable to complete the exploration at this time. If someone would like to make a video to show others how this is done that would be nice, as some find exploration easier to replicate with video reference.
Here is the album iron ducks - Imgur