The centre of the earth
Surrounded by Mount Parnassos, the UNESCO World Heritage site of Delphi was considered by the Ancient Greeks as the Navel of the Universe as its legend maintains that it’s the place where the God Apollo was worshipped as he killed the dangerous serpent Python that initially guarded the place.
The Cretans built a sanctuary to honour Apollo and Apollo has a 'Fortune Teller' - Pythia - who 'prophesied' the future. Science has since proven that a crack in the earth released vaporous gasses, including methane and she chewed a specific type of leaf, meaning Pythia’s fortune telling gifts were more likely that she was ‘high’.
Pythia lived in the bowels of the Temple of Apollo (now closed off to the public, only Archeologists are allowed in) and only the Priest could visit her and take her answer to any questions people posed.