I have to go with
@cbroad - Styrax. The pendant flowers cinches the identification. For a second or two I thought it might be Prunus laurocerasus, the cherry laurel. But the cherry laurel is usually evergreen, and more common further south than where you are. The Prunus flowers are not pendant, and in the cherries the flowers have separate petals. Your photo the flowers are fused, corolla, with lobes instead of petals.
So Styrax is my guess. Most likely Styrax japonicus, but it could be Styrax americanus, though the native species is pretty uncommon in woodlands today. It the Styrax is in human planted landscape, almost 100% chance of being Styrax japonicus, if it was off somewhere in pristine, old growth forest, then Styrax americanus is a possibility.