The lore of Darkroot Garden?
Personally, I think it is the ruins of Oolacile. Compare the two carefully, and you can see they have the same architecture. They are also comparable in the sense that where Sif is, the Sanctuary is. Where the Forest hunters base is, the elevator to Artorias is.
Do you agree with me, or think something different? Please, let me know. I'm just speculating, but with evidence.
Personally, I think it is the ruins of Oolacile. Compare the two carefully, and you can see they have the same architecture. They are also comparable in the sense that where Sif is, the Sanctuary is. Where the Forest hunters base is, the elevator to Artorias is.
Do you agree with me, or think something different? Please, let me know. I'm just speculating, but with evidence.