All 3 "Catacomb" dungeons in Bur, also Northern Catacombs, Eastern Catacombs and Southern Catacombs have the same layout. Northern Catacombs leads to Humid Guruk Caverns portal 41-80, Eastern Catacombs to Steamy Guruk Caverns portal 81-120, Southern Catacombs to Deep Guruk Caverns 120+, the last one with Bosh Bosh and Matriarch Vik'Liri Di. In addition, the Southern Catacombs have a portal to the Upper Catacombs disguised as a Rock, which gives access to different quests such as Kaurik's Ghost Messenger and (speak to Scout Leader Tmauruk in Kor-Gursha to get flagged for this.