The Serpent Mound points to the cusp of Piscis and Aquarius. 

This is like the holy grail; it demonstrates our arrival at the moment in eternity when we are free to choose. The eternally present Now. The sun solar image represents the vesica, and the womb of sky, and the triangle represent the crown of sky and the agni-crown biocosmic ladder. The serpent swallows the initiate and the initiate dissolves to enter the "otherworld" of the emotional body, accessing serpent kundalini's pineal gland's moleculer jet fuel for astral travel. Two destinations above and below: Plieades and Hu Nob Ku. The serpent's gland mirrors the triangle's shape, across the "egg". It is both inside the serpent's head, and simultaneously outside the serpent's head. A biocosmic journey through the serpent ladder, inside and outside our heads. A fractal universe and an internal dimension accessed with the assistance of the emotional and sensory nervous system, by distracting the frontal lobes temporarily, allowing the sensory systems current to reverse, causing the serpent ladder to swallow the initiate, and begin the cosmic adventure beyond lifetimes, in the biocosmic temple.  The access bridge is an emotional roller coaster, but its ultimately a psychological paradigm in which loving kindness, respect, and gentle speech, and quick to forgive self and others.  These are the keys to the Kingdom, I left the light on for you.