Lower Guk
The Ruins of Ancient Guk is a vast array of tunnels that connect between the ruins themselves and the upper tunnelways that eventually lead to the Innothule Swamp. It is also the battleground between the living frogloks, led by the Froglok King, and the undead who have taken over most of the deepest ruins, led by their Ghoul Lord.
Lower Guk is one of the two primary dungeons for high level characters (35-50). While there are other hunting areas open now, lower guk continues to be one of the most crowded dungeons at primetime. One of the major reasons for this is that the loot here is very good, with many of the "best of class" items available here. Lower Guk can give very good experience, especially at the off hours, but during primetime, finding good uncamped hunting areas can become very difficult.
Lower Guk is accessible from Upper Guk in 4 areas, however, 3 of the 4 entrances lead to near the same spot, called the "dead side entrance". The entrance from upper guk that is further away from the rest leads to the "live side entrance". Guk is typically divided into two sections, live side and dead side. The live side contains live frogloks, while the dead side contains froglok ghouls. These two factions are supposedly warring, although they won't attack each other or anything like that.
The live side is less camped than the dead side, because many people don't want to hurt their froglok faction. Live side also has a lot more wanderers, so it can be considered more dangerous, and I'm sure many many people get lost in the maze on the live side. The monsters here range from the Shin Knights at minimum level 27, to the Froglok King and Guk knights, who reach level 49.
You must be at least level 5 to zone into Lower Guk.
The original source continues with tabular game data (maps, spawn tables) omitted here. See it at the source ↗