Do you have an all-over photo of it, poppy? It does look like some sort of lily but I'm not quite comfortable with it's center.
It is a beauty and I agree with Droopy, we need a full shot so we can see the leaves and how the flower or flower cluster is attached.
Were the leaves very large and arched toward the ground? It could be a crinum lily, but I can't be sure without seeing either the leaves or the flower spike.