Here is an interesting use of earthbags to create a self-supporting  arched entrance to a park. This was reported in  Buffalo Rising of Buffalo, NY. It is part of the Street Synergy Community Garden (which was once a dumping ground), and was created by volunteers. They say that “It’s a solid, inexpensive, creative and earth-friendly way to add a signature gateway to an already impressive park.” I hope they intend to plaster the entire thing before the bags disintegrate.