Information Obtained.
Perceptions.. Aside from wierd trees, nothing catches your attention.
Knowledge Religion Raziel/Heva.. The manner of internment and tomb suggests the mound was constructed by lizardfolk.
Knowledge Nature.. Heva.. Awakened Trees, not as kickass a treants but still.. desecrators beware.
Knowledge Geography. The 'wall' runs between two areas of higher ground. The land you stand on has all the appearances of a land previously flooded.