Selective colour examples - Experiment plan

What is 'Selective Colour'?

I plan to capture fairly basic photos of a landscape, however edit them in photoshop to create the 'selective colour' effect. It is what it sounds like, where a particular element of the image is changed and highlighted. In most cases, the whole photo is changed to a mono, black & white colour scheme with the one particular part kept the same or made even more vibrant. Here are some examples:

As you can see, the effect not only looks awesome and unique. It also highlights a certain part of the photograph, drawing the viewer's attention to the most important part of the image.

Here is a photograph, before and after editing:





Here are the instructions I intend to follow, in which I found on the same website as the examples above:

Here is the link to the website:

http://www.photoshopessentials.com/photo-effects/selective-coloring/