Ruins of the Temple of Apollo, Delphi, Greece.
Apollo spoke through his oracle: the sibyl or priestess of the oracle at Delphi was known as the Pythia; she had to be a blameless woman chosen from among the peasants of the area. She sat on a tripod seat over an opening in the earth (the “chasm”). Intoxicated by the vapors, the sibyl would fall into a trance. In this state she prophesied. It has been speculated that a gas high in ethylene, known to produce violent trances, came out of this opening, though this theory remains debatable.
Delphi, Greece 38.479309886 22.493129228