This will unlock the 'Doom (2016) - BFG Division' album. a hole in the wall to the right, you can see a courtyard with a pool of green.
If you're looking for other things to find in the game, our Doom Eternal secrets page can help It's also where you'll come across the beat the Marauder in 30 seconds challenge. Samuel Hayden guides the Slayer through the remnants of an ancient civilisation, which at the same time is more than familiar for the protagonist for many reasons. This is the last and biggest mission in Doom Eternal, and probably the one with the most collectables and secrets altogether. Taras Nabad is the ninth level of Doom Eternal, following on from Sentinel Prime.