On the right ran the wall of the stockade, impenetrable and unscalable, and it was a long two miles to the north gate.
It was for a long time supposed to be unscalable from the north side.
All right—let's go down and see what it did to your unclimbable slide and unscalable walls, Ventnor.
He looked back at the Gerns and saw they were within a hundred feet of the—for them—unscalable wall of the stockade.
The shore curved inwards in a deep bay just there, and the cliffs rose sheer and unscalable from it to a considerable height.
At each side rises an unscalable rock wall with a height of from three to six hundred feet.
And then that terrible mute dining-room, with the high, unscalable mantelpieces that no midget could ever reach!
The great wall itself seemed to be one vast, unscalable precipice, capped by a series of shining spires.
They are a boundary, a dividing line, a wall impregnable and unscalable.
To the east of him he knew that there were three miles of almost impassable shore, of unbroken, unscalable cliff.