How to make something look large

My 2¢ worth . . . .

Nice photo, by the way.

Some ideas have already been posted - put something in foreground, cropping, etc.  I'd suggest getting much closer, perhaps shooting at an angle so the ridge looms in the foreground and disappears in the distance.

One of my 'cheap tricks' for horizontal panoramas is to stretch them vertically.  They seem to look more like the way I remember the scene that way.

In Photoshop:  Image>Image size>select 'resample image'>deselect 'constrain proportions', and then change the height but not the width. You might give up some image quality doing this - I've not noticed it on large prints, but then I've never luped 'before and after'.

example - 'stretched' version on the bottom - cropped a bit of sky too.