Standing inside a tower in a dream means that one should not feel safe from the blows of his enemy, or expect to be secured and safe in his own environment when someone calls upon him for something. If he is sick, it means that he may die from his illness. Standing on top of a tower or a wall in a dream means that one will conquer or capture a dangerous person. If one stands over or inside a tower that is no longer in use in a dream, then it represents his grave. (Also see Grave)
Read more about dreaming of Tower in other dream meanings interpretations.