Answer:
Ancient and majestic, great big piles of stones, Used to encase both riches and bones. Seen from certain angles, They look like big triangles.
They come out at night without being called, and are lost in the day without being stolen. What are they?
What goes up when the rain comes down?
How can a pants pocket be empty and still have something in it?
What always comes into the house through the keyhole?
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.