For nature lovers, they find the garden as a close representative of Mother Earth. They find staying at their garden as something very relaxing. To add to the nature effect of your garden, you might consider using stones and rocks to make the look more natural. Check out the article for more ideas.
This one looks amazing. You can use a wire and form it in a fence. Then you can just fill in the stones in it. Just like in the picture.
People who are a fan of butterflies would love this. Form colorful stones in to a butterfly or any creature that you would like. You can also use printed stones as a stepping way in your garden.