The wall factorWe walk by them, live inside them, travel over and under them, even walk along the things. Unless you are in the middle of a wilderness or similar, there is one thing you cannot get away from, walls. They are used for a variety of purposes, yet often we miss those vertical upshoots as we travel, because we are so used to them.
Then there are the fences
No matter where we are or how they are negogiated, walls and fences are a part of our societies. Next time you're out take a closer look, you might be surprised at what you can find.