Arachnaea

Arachnaea is one of the locations in TERA. It's open world, non-instanced dungeon in Quarantine Zone, Val Palrada.

Arachnaea has three levels: Arachnaea Main (middle part referred as The Lair), The Hatchery, and Wary Vigil.

There are federation camps in every level. Naming is confusing: Teleport master lists camps as Arachne's Bane (outside near entrance), Roughneck Outpost, Sanctuary, and Retribution Point. Retribution Point is also name in compass for whole top level.

Lore
''An underground spider lair home to arachnens and other horrors, Arachnaea got the attention of the federation and the Mysterium when scouts found the sinister Atel Akaad organization there. Arachnaea may also be the source of morboliths, the magic-infused stones that spread the mutation plague currently raging in the Quarantine Zone. Some see Thulsa’s hand in all this.''

As if arachnens and Atel Akaad weren’t enough to contend with, the damp caverns of Arachnaea are also home to numerous ovoliths—large and lethal foes.