Few tips...
First, focal length. Telephoto lens tend to distort perspective in a way which makes objects in background appear closer then they are, while on other hand, wide angle lenses attenuate distance between them.
Next thing is stronger contrast between light and dark areas/zones helps give impression of deeper and richer space (especially with detailed surfaces) Add & match sun to HDRI and get sharper shadows.
Finally, map those tones ;)