What is Wordless Wednesday?

To maintain some consistency in my blog, I am participating in the blogosphere phenomena that is "Wordless Wednesdays". On Wednesdays all over the internet, bloggers post a photograph with no words to explain it on their blog. The idea is that the photo itself says so much that it doesn’t need any description. I am hoping this will motivate me to post more often. Since the theme of my blog is (making) lists (and following them), I will start with posting my five favorite artworks. First picture coming next!