There are a couple of ways of converting a photo to black and white on photoshop. You can:
- Black and white converter
- Desaturate- however, this creates a flat image
- Channel mixer is the preferrable way as you can mix the RGB channels to either brighten or darken in different areas.
I used the channel mixer to change it to Monochrome and then altered the RGB channels- increasing the red to bring out the right hand tree, and decreasing the blue to increase the contrast in the water jets.
The next thing to do was to to Dodge and Burn the highlights, midtones and shadows. Dodging adds white, and burning adds black.