Beyond the stones, you will find these strange looking devices. They reminded me of prayer wheels, for some reason, though I don't think they rotated. Perhaps you are supposed to tie ribbons to them?

I posted a film about Muntyan's Labyrinth the other day, and somebody commented that these frames are probably for Dragon Fruit. If you look you can see they are planted at the base, and they grow up to the top areas where they spread out. I guess the ribbons are just an aesthetic choice.

Another comment addressed the whole labyrinth / maze conundrum. It turns out that there are a series of Labyrinths to be found in London at the moment, on the Underground.

If you follow what I now know to be the male or female labyrinth, you will eventually come to a single rock.

And here is the large "Zodiac Labyrinth".