If the artwork is on train tracks, is it still called street art? Rail art? Either way, we’re loving this series by Portuguese artist Artur Bordalo in which he cleverly converts the horizontal lines of train tracks into a canvas. The series, which have been popping up on railways throughout Portugal since early this year, often use bright, neon colors which create a nice contrast between the dull gray rocks and tracks. Each work is accompanied by subtle titles that can be playful but also harbor critical or cynical undertones.

Via Lauren Moss

The half-forgotten art of knitting has hit the streets with force. People all over the world are grabbing yarn or wool, crochet hooks and needles, and are learning how to knit. The colorful pieces they create are showing up on trees, lamp posts, monuments, benches, and other elements of everyday cityscape.

Visit the link to explore the history of yarn bombing and examine a few inspirational projects.

Via Lauren Moss