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The mountains look completely different to ours... this is because they formed through different processes. Ours largely form via plate tectonics, the moon's mountains form due to other processes. Ask a lunar geologist or get a book on it. We have many of the answers now as astronauts have been there!

distant mountains

The mountain in the background on Apollo 15 should be higher in the picture if it is 3km high and only 10km away. I have seen several you-tube clips and websites by conspiracy people that mention this point. Two answers coming up...

They are all completely forgetting that the moon's horizon is only 2.43km away standing at 2 metres above the ground; 5km for the Earth at sea level. The moon is a smaller sphere than the earth. Not once is this ever mentioned by the conspiracy nerds. The base of Hadley Mountain starts well below the moon's horizon and cannot possibly compare to one on earth.  It's that simple folks!  (The horizon is behind the astronaut's waist).

If the same mountain was the same distance away on an asteroid, it may be on the opposite side so would be impossible to see at all. We need to think in 3D not 2D. 

Formulae & diagrams included in the book from 4th October 2018 if you wish to check the maths yourself. This is how science is done.

Another factor that needs addressing; the Lens. To compare a picture of another mountain on earth of the same height and distance, you also need to use the same focal length lens for a real comparison. This is never mentioned either. Using different lenses would be a very unfair comparison. A slight zoom compared to a wide angle shot would completely alter the apparent image size of the mountain concerned. Any experiment that doesn't address this is flawed and doesn't count.