Board Thread:Questions and Answers/@comment-8198876-20130414191313/@comment-1757231-20130902013944

69.35.184.186 wrote: I've once found a weird conglomeration of dungeons, arranged in a near perfectly rectangular fashion with divided rooms, it was made of basic dungeon materials and had 15+ spawners, and some were ones ( for example endermen ) that wouldn't occur outside a mod. I've never seen another one and can't provide screenshots as this happend before the launcher updated and labled this version as "Classic". Does anyone know what the proper terminology for this structure is? and what mod(s) caused it to generate? Okay... that isn't a implemented feature in current Tekkit Classic. Though, there are multiple mods which make this happen, though no have (nor have ever been) implemented in Tekkit Classic. Are you sure you are playing Tekkit Classic, not FTB Retro, Tekkit Lite, Tekkit or Big Dig?

Anyways, the only mods which do this (of my knowledge) are:

Dimensional Doors

Better Dungeons

Dungeon Pack

Adventure