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.
I occur twice in eternity. And I'm always within sight.
What was the first man made invention that could see through a wall?
Which is the oldest tree?
What hangs in the sky by day but at night goes away?
What did the piece of wood say when he saw the screwdriver and screws approaching?