Protecting your garden from having people walk into it

I have recently discovered that my careful and artistic arrangement of my watering heads,  misters, and lights has caused an inadvertent effect - people are accidentally kicking them. Since I've gone to such great lengths to have them be as invisible in the garden as possible, I really shouldn't have been surprised, but I was. Walking around with someone telling them not to step in the garden is guaranteed to insult your visitors! Don't do that! Of course, everyone knows that you shouldn't step into a garden (anymore than you would walk across someone's dining room table), but, well, they don't. So I have recently discovered a solution -  which is using rocks.

The type of rock that you use for this is very important. If you choose a flat rock, it will just look like a stepping-stone, and you will be encouraging the very thing that you want to discourage. You need pointy rocks. Even the most nimble-footed person will be reluctant to step on a pointy rock. It says, *keep out* better than anything else. And, as you can see, done correctly, it says it in a beautiful way that enhances the garden. It's a good trick.

You don't need to cover your entire garden like this, only the distance of a normal footstep (about 2- 3 feet). This will discourage casual stepping, as in someone leaning over to smell a flower and bracing themselves by stepping into the garden. This will not stop children - so if your garden looks like mine, there really isn't anything you can do about kids. This will stop adults who really don't mean any harm - the ones who step on small plants, or kick the lights or watering system because they didn't see it, or they stumble. And that's another reason to use rocks like this. It helps guide your eye to something that you may kick accidentally. I have used some nice quartz, which is white, along the edge, which seems to almost *light up* - even at night.

Now I need to find more pointy rocks!