The Walking Dead theory: Who made the tunnel?

TWD Theory #4: Somebody else made the tunnel.

Honestly…this is the most logical option I’ve heard, and, the fact that it has just about no evidence to support it actually helps it.  Let me just say this for the record: I’m becoming increasingly convinced that the mere existence of this tunnel is pure insanity. Thank you.

This one is completely of my own making, and, I hate the fact I have so little in the way of evidence to actually back it up.

Anyway, this theory is a simple one: Someone (Or some other group), completely independent of both the Alexandrians and the Whisperers, built the tunnel, presumably, at some point well before the outbreak began.

Who? Beats the hell out of me.

It’s in northern Virginia, not too far from Washington, so, maybe it was something the military built for some purpose, but, I don’t think that’s terribly likely.

What makes the most sense to me is that maybe it’s a long forgotten path on the Underground Railroad. It is in Virginia, and it is not that far from Maryland, so, it would make sense that there might be such a thing in that region, though, I was under the impression the term “underground” meant that it was secret, or that the stops were in the basements/storm cellars of sympathetic people, not that it was literally underground, but, considering the former was true, I imagine if the latter was, no one was going to announce it to anybody at the time.

The great thing about this — As much as it annoys me — is that I don’t need evidence, per se, for this theory. I’m not saying any character in the show dug the tunnel, I’m not saying any group in the show dug it, I’m merely supposing, using the history of the region, that someone who lived in the area at some point in the past, built that tunnel, and the Whisperers just happened to stumble upon it.

…And then never use it, even though…it probably could have won them the wa–DAMN IT! THIS MAKES NO SENSE!!!!

Wait. There is one last possibility…