Coral Castle: Edward Leedskalnin

Was it just a personal sculpture project by Edward_Leedskalnin or is it some strategically placed shapes?
http://www.leedskalnin.com/LeedskalninsWritings.html, http://rense.com/general39/coral.htm,
http://www.conspiracy.co/forums/content/10-secret-egyptians-edward-leedskalnin-7129-6105195-nikola-tesla-3-6-9.html,
http://jf-databits.blogspot.ca/2012/12/edward-leedskalnin-coral-castle.html