Here some man make a mark in land for a special spot or the remenbering of a special person. STONES in piles like PYRAMIDS. Pyra can be a pile of wood to cremated dead people in some civilization. My attencion is always picked up in funny way with this pile of stones. And my couriousity always payed of. Except in Azores (a vulcanic arquipelago in the middle of Atlantic Ocean) where they do this piles to take the rock out of the fields for agriculture purposes. And well it is impressive see it for yourselves.
Pico Island - Azores - Portugal