This scene from the David C. Lam Asian Garden was originally taken as an unremarkable colour photograph. It was then transformed into black-and-white using Photoshop’s Calculations command via a 100% overlay of the green and blue channels. I’ve noted it before, but it bears repeating–if you like playing around with black-and-white, the Calculations command is a far better path of action than simply transforming a photograph directly into greyscale.
The main plant in this scenic shot, Petasites japonicus var. giganteus, will be featured in an upcoming Botany Photo of the Day entry; I’ll write more about it in accompaniment to that photograph.
Photography resource link: Polarizers via The Luminous Landscape. Concluding quote from the article:
A polarizing filter is the most productive accessory that a [nature] photographer can have in his kit, second only to a decent tripod and head.