Strange Ruins

I sent Nidhal back to stay near the plane wreckage in case someone came looking for us then I laid eyes on the strange ruins we stumbled upon. It was unlike anything I've ever seen.
I took steady steps towards it then laid a hand on the wall, it didn't feel like any material I knew of. Nidhal came and before I took another step in he led me to the peak of a cliff overlooking the place. No wonder I didn't recognise the material because it was bone. There were no ruins but a huge long dead beast's skeleton.