See this link http://maps.eq-toolbox.com/images/Pojustice_1.png
I also recommend getting the full map package from maps.eq-toolbox.com to use with LoY mapping feature.
You can see where the hidden caves are. The section of a wall is actally secret door. There is a ghost dwarf in the cell. I highly recommend Invis to undead when going there. The place is tough: a lot of cleric mobs, and they will CH each other and themselves. A good chanter is a must. I also recommend pulling mobs a little back, into cleared territory, cause some cave twists are close enough for mobs to heal each other through walls.
i havent come across any cleric mobs down here myself, just druid mobs (they use greater healing i think) and one named worm taht was a paladin. Ive killed at least 50 beetles and no eyes yet =( the search continues.