Question

what is haven under the hill

Answer 1

To their haven under the hill; But O for the touch of a vanish'd hand, And the sound of a voice that is still! The fancy, "stately ships" pass by the speaker and head to their "haven," or protected port. The port is "under the hill," so there must be a big hilloverlooking it.

Answer 2

heaven under the hill means the nature's beautiful place which really means in a small place , where there is so many happiness