Beautifully composed, Dave. Expansive, yet well-proportioned. And the mono conversion worked very well.
Given the slight ‘dullness’ of the face of the monolith, I would recommend an adjustment brush application with a slight increase in exposure and clarity, just to help set it apart from the surrounding tones. But that’s a minor tweak and, perhaps not necessary if the raw/print shows what the jpeg doesn’t.
What a productive trip! This photo alone, printed large and hung in the lounge says it all, I’m sure.