Engwithan Digsite is a location in Pillars of Eternity 2.
Notes & Tips
At the bottom of the Arena, there's some panthers. Kill them and free the researchers in the cage nearby, you will learn what happened here and find potential companion Aloth.
If you play on Path of the Damned difficulty level, some boars along with panthers and the drake will be waiting for you at the arena pit. Choose your build, party composition and tactics carefully or just attempt to sneak past foes into Arena Sub-Level - the beasts will be gone after you obtain Oderisi's Notes and come back.