Shut doors equal open questions.
 What is back there? Or just what was?
 Is there a wonderland inside?
 A secret lab? A smuggler's lair?

 This might seem poor, rundown to you.
 Shut doors equal open questions:
 Was there a dream of wealth here once?
 A business, school, a home, or what?

 There's no way in that I can find:
 No lock, no key, no owner nearby.
 Shut doors equal open questions
 Like, what sort of treasure's in there?

 So many curiosities
 Will go unanswered in this life:
 Time calls us elsewhere always, but
 Shut doors equal open questions