Answer:
What can be swallowed, but can swallow you?
Hold these between your knees if you want to set a Cuban beat.
Has no feet, but travels far. Is literate, but not a scholar. Has no mouth, yet clearly speaks.
Mountains will crumble and temples will fall. And no man can survive its endless call.
I am a box that holds keys without locks, yet they can unlock your soul.
Sometimes I am white, sometimes I am dark. Most people love me. What am I?