An almost perfect hole bored down into a river rock. DReed

I am always fascinated by the unique shapes found in nature off the beaten path. Was this hole caused by man in some logging or mining operation along this remote stretch of stream? Was it a result of  volcanic activity or some erosional influence when the rock was vulnerable? Some might even think there is some underworld/other world influence here…a window toward faeries. Above is a hole in a rock in a remote spot along a stream. It captures the imagination for long enough to snap a photo.