The primary response to that question SCREAMS to be "There was no intentions involved"...

Facts
1) You are aligning a naturally occurring geological shape with a human construct...

2) You are hinting a higher authority/polity existed to execute this alignment with no evidence such an entity existed...

3) As proof you offer the alignment itself, and no other records or clues at all.

Pure speculation, and imho not even very good speculation.

Jammer