Answer:
What has a spot and is very bright, is sometimes, red, white, blue, yellow or green and is often blinding.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
I am mother and father, but never birth or nurse. I'm rarely still, but I never wander.
I grow for a surface, even if you cut me. I continue to grow even after death.
A great mysterious place that the bold have been known to journey into.
What do angels sing in the shower?