I don't know when I will ever have enough rocks to make a wall, but it would certainly be doable to do a spiral in he space between pavers as in one of the pictures. I could use rocks from the landscaping around the house.
Amazing what you can do with stones and a bit of imagination. http://theownerbuildernetwork.co/tgik
Quirky & fun!! great DYI with a large piece of reclaimed wood...10 DIY Repurposed Chair Ideas | NewNist