Not only do I find clothes lines to be fun and whimsical, they are also very functional. They allow you to hang a ton of photos, artwork, and inspiration on your wall without making nail holes or ruining your walls with tape, pins, tacks etc. You can also change them out at a moments notice! Here are a few examples I've dug up - mostly found here:
The art teacher in me also says it's a fabulous way for all of you parents out there to display your child's artwork - a great alternative to the classic fridge and magnet approach.
And here are a few other similar ideas:
Who knew that some string and clothespins could be so chic and useful inside of the house? I may even create one of these in my art room to display student work...