Ben Wilson is a London based artist who, since 2004, has been beautifying the city by painting small drawings on sidewalk gum. It's said that at any moment, there's about 300,000 pieces of gum stuck to the sidewalk on Oxford Street. People just spit them out, and once stuck, they are very difficult to remove and clean up. However, this doesn't faze Ben Wilson. He gets on his hands and knees, pulls out his acrylics, and paints a miniature scene on each of them.
According to the BBC, Wilson's been doing this for six years, and made some 8,000 different paintings, which he photographs and catalogs.