Summer Solstice at Compass Cave 2007

'The northernmost cove in Oklahoma's Anubis Cave complex features an enigmatic compass rosette on its floor that portrays the earth's 23.5 degree tilt from the ecliptic either side of due north. On the back wall is a Celtic Ogham inscription that translates as: 'in the month of June reaches the illumination this far out'. Indeed, at sunset on the summer solstice, the shadow of the rock wall reaches its southernmost extremis of the year, just eclipsing the last vertical mark of the description.'

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