Working with the tonal map of an image can do wonders to an image. What is normally visible to some extent by the human eye, is rarely visible on a computer screen or an LCD monitor. Camera sensors do capture to some extent good enough tonal range, but not as good as the human eye. A few corrections, and here is what we get:
This does not mean the feet are dirty, this just amplifies the difference in the skin color of different areas of the feet. Look at the details showing up on the pebbles and the floor.
Another example of HDR creation is:
This pic of the dilapidated bungalow was taken somewhere in the Camp area in Pune.