That tall wooden structure beside the driveway is not a lookout tower, giant birdhouse, or wildlife feeder. It is actually a homemade driveway periscope, built to help drivers see approaching traffic when the road is hidden by a hill, curve, trees, or another obstruction. The original Oregon mystery was discussed online, where people familiar with the location confirmed that the driveway sits near a dangerous visibility problem.
The idea works using the same basic principle as a submarine periscope. Inside the tall enclosure are angled mirrors. A mirror positioned higher up can see over the obstruction and capture a view of the roadway. That image is then reflected downward through the tower to another mirror near the glass section at driver height. Someone leaving the driveway can look into the lower section and check whether a vehicle is approaching before pulling onto the road.
