What's This? SBThis is an interesting spot I came upon, in Oregon. The lower left portion of the natural, small cavern has what appeared to be a man-made oven, fire pit or such. The rocks above were coated from the smoke. I have never noted this spot before in outings to the area, so I was either oblivious (quite possible) or it is a more recent creation, which is odd given the environmental restrictions to the area.