Answer:
My rings are not worth much, but they do tell my age. What am I?
I have a little pool with two layers of wall around it. One white and soft and the other dark and hard. Amidst a light brown grassy lawn with an outline of a green grass.
I am the beginning of eternity the end of time and space the beginning of every end the end of every place.
I am the book one can never finish reading
you need thousands of me to create a digital image.
What age most travelers have?