Allie has come back to Noah, her high school sweetheart, after many years away and a new fiancé… They are clearly still in love with each other.

On the surface, in this scene in the canoe, Noah seems to be telling Allie about migration patterns of geese, but it’s more charged than that because he’s not talking about GEESE getting back to where they belong. He’s talking about ALLIE getting back to where she belongs.