Answer:
I run around the city, but I never move.
As round as an apple. As deep as a cup. All the king's horses can't pull it up.
What can go through glass without breaking it?
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
It is greater than God and more evil than the devil. The poor have it, the rich need it, and if you eat it you'll die.
What age most travelers have?