Lots of small buildings around like a mausoleum
Lots of angel and devil symbology
Eliander Fireborn came here investigating something to do with Tharizduun (the one who created the Abyss)
Writing on the angelic statue, in Draconic "Let the sins that haunt us in life be forgotten in death"
Theres Abjuration (Protection) magic all over the place, walls mostly
Secret wall in the crypts, block engraving of a Minotaur
When I was above ground and looking around there was a ghostly version of the building as if it were invisible or on a different plane.