Sundial in a Tunnel

What is this beautiful thing
That we've found?
Is it a sundial underground
Or just a building falling down?

I’m so happy I could scream
But when you said I dream everything's fine
What is this terrible thing
That has gone away?

Is it a beautiful day
Or is it just OK?
You're so happy
So why am I so sad?
You prefer tomorrow
To the times that we once had

What is this wonderful thing
We once had?
Is it baby singing dad
Or driving each other mad?

What is this beautiful thing
That we’ve found?
Is it a sundial in a tunnel
Or just our home coming down?