Hey this is my first post in exploration, and i hope all this is in the correct section. This video and the directions will explain how to get into the Cavern of Endless Echoes or take a left turn and be under Pandaria.
Directions
(if you dont feel like reading, just watch the video, its like all covered, this is just easier written directions)
#1. Fly over to where the rare Sulik'shor - NPC - World of Warcraft is
#2. Go to the spot where i went when i flew down in the video.
#3. Put on walk(not neccessarily needed) and mount on your biggest ground mount and as it completes, move forward and jump.
#4. Go through the wall and mount on your flyer and this part imo u need walk.
#5. Fly up the slightest bit to where you can stand on the rocks.
#6. Slowly move across the rocks to where you see the opening in the mountain.
#7. Now this is your choice. Choice 1: Take a left to explore under Pandaria. Or Choice 2: Continue on entering the cave.
#8. If you chose Choice 1, np and you can exit out of this or leave a comment =p. But if you chose Choice 2, then just go through the wall and hug the wall and walk in. You will need to do this quickly because it dismounts you. And like 99% of the time you fall into the cave.