Answer:
What stays on the ground but never gets dirty?
I have rivers without water. Forests without trees. Mountains without rocks. Towns without houses.
Power enough to smash ships and crush roofs. Yet it still must fear the sun.
Late afternoons I often bathe. I'll soak in water piping hot. My essence goes through. My see through clothes. Used up am I - I've gone to pot.
A precious stone, as clear as diamond. Seek it out whilst the sun's near the horizon. Though you can walk on water with its power, Try to keep it, and it'll vanish within an hour.
What covers its face with its hands, speaks no language, yet most known what it's saying?