It is a section of the Tower with a single area. It is reached by jumping off the Tower from your starting point, which appears to be Area 4, but can only be reached in very specific quests. This area's camp has no bed or supply box which means supplies are never dropped off during the quest. Only 1 gathering point is in the area, which is located on the east wall and contains Battlefield Jewels and Decayed Dragon Scales.
Large Monsters:
Astalos
Chaotic Gore Magala
Espinas
Flaming Espinas
Garangolm
Gold Rathian
Khezu
Lunagaron
Malzeno
Primordial Malzeno
Nargacuga
Lucent Nargacuga
Pyre Rakna-Kadaki
Rajang
Rathalos
Apex Rathalos
Silver Rathalos
Risen Shagaru Magala
Scorned Magnamalo
Velkhana
Violet Mizutsune
Aruganosu
Arzuros
Redhelm Arzuros
Bulldrome
Chameleos
Deadeye Yian Garuga
Gammoth
Gendrome
Gilded Diablos
Glavenus
Hellblade Glavenus
Gore Magala
Goruganosu
Grimclaw Tigrex
Kamu Orugaron
Nono Orugaron
Kirin
Thunder Emperor Kirin
Silverwind Nargacuga
Mizutsune
Furious Rajang
Azure Rathalos
Dreadking Rathalos
Destruction Wyvern Rathalos
Rathian
Pink Rathian
Dreadqueen Rathian
Shagaru Magala
Stonefist Hermitaur
Thunderlord Zinogre
FFBE Zinogre
Unit-01 Brachydios
Unknown
Valstrax
Witch Gobul
Witch Lagombi
Zenith Harudomerugu