El Castillo.

Whilst in Mexico last year, Maria took this stunning photo of the Mayan pyramid at Chichen Itza.  I use the word “stunning” with deliberation, because the word can be traced back to “ex tonare” (out of thunder).  One can easily imagine that the ancients felt thunderstruck by whatever mystical power resides at the top.

Myself, I am awed by the thought that ancient people built this. How did they get this knowledge?

Thank You Maria, for permission to publish your photo.