I've been having another play with black and white conversion.
I selected this image for the strong light and shadow on the path.
I find images with stronger geometric lines and shapes much easier to deal with and personally find this image a little cluttered due to the foliage (colour defines the areas better)
I used channel mixer to convert and 'Selective Colour' using the Blacks and Whites (left the Neutrals channel alone as it muddied everything up) and selective Dodge & Burn, focusing on the stone sign to the left in its own layer.
C&C welcomed, particularly around the post-processing side of things.