Reality could well be - without a doubt - invisible. A well built monument may now exist, but can be struck once, and destroyed tomorrow - away from sight. But a tiny strand of grass cut countless times, can live forever, - unseen are the elements that allow it to maintain, but they are alive, and undeniably real.
We are much like the grass, our bodies are strands, the life inside is the element unseen, and may last forevermore; when the world scissors us away.
It is nothing one can point to, it's only life, breath, and growth.
All earthly, unnatural objects, spawned from a strand of imagination (life) , and reality.
The monument is but an illustration in a storybook, told by the hearts and minds of artists.
Therefore, reality doesn't surround us, it's within us.