Answer:
What has a mouth but can't chew?
Iron on a mammal. Mammal on your feet.
A muttered rumble was heard from the pen, and I, in my walking stopped to look in. What was this I saw? A massive beast, hoofed, and jawed. With spikes upon its mighty brow, I watched as he struck the turf and prowled. And yet for all of his magnificence, he couldn't get out of that wooden fence.
What is the heart of many risks, has a heart, but is not a living being?
Covered in stone and sun. It's home to many but also none. What is it?
Brings the sky a lot closer.