Stopping along the way to let Mr. Oliver T. Puddington relieve himself, I discovered two pairs of panties. Yup; two pairs of ladies panties, right there in the grass on the side of an I-94 on-ramp.
On the third stop, we found an old birdhouse. That was the thing we picked up.
(In this photo, you can see the back of the birdhouse as it sits, sideways, on an old bench.)