Hey, for this teleport you have to complete quest chain from Freya in Sholazar (starts here The Lifewarden's Wrath - Quest - World of Warcraft). Now we should get access to this teleport only during the quest, however we now have flying mounts in Azeroth so the spot is easily reachable even after completing the quest. Some pics:
TL;DR version:
1. Complete Freza's quest chain in Sholazar
2. Go to Ungoro Crater (coords 50,9)
3. Teleport to Sholazar
I hope this could be useful for Archaeologists, daily quests in Northrend etc.
Also small tip at the end. Easiest way to get to port is just take Uldum portal from OG/SW, then fly to this spot.