Fifty years ago, pieces of an ancient wall peaked out from underground all around Rockwall, TX. Today, much of the wall has been buried, but this quiet Dallas suburb may be host to the oldest surviving structure in the United States. It seems pretty clear that this wall is man-made, or at least intelligently made. Yet, despite all the signs, the public discourse regarding the wall is that it is a natural formation. Even still, conspiracies about the wall abound. Some people are convinced that giants were involved. We don't know about that last part, but there's no way this thing is natural.

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