Hi, does anyone know how to enter this zone from Thalumbra? There is a rock wall with miners. I have clicked on some of the rocks to attack them thinking it would break down the wall, but nothing happens. Thank you in advance
I'm not sure what rock wall you're talking about. The zone-in can be reached simply by flying to it. Here's a link to the POI, its /loc, and where it is on the map. An even faster way to reach it (rather than traveling to Thalumbra directly) would be to go to the elf city in Obulus Frontier and use their portal, which places you right at the dungeon's entrance.
Until you do the quest that opens up the caves, you have to fly the long way around to get here. If you have faction with Ny'Caelonia in KA, you can go there and take the transporter direct to the instance portal.
You also need to do one or two quests to even see the purple glowy entance to the zone. Well at least when I last played...