The archaeological site of Delphi is an UNESCO World Heritage site near the modern village of the same name in Greece. In ancient times it was the site of the most important oracle of the god Apollo. Delphi was revered throughout the Greek world as the site of the omphalos stone, the centre of the universe.
In the inner hestia, or hearth, of the Temple of Delphic Apollo, an eternal flame burned. After the battle of Plataea, the Greek cities extinguished their fires and brought new fire from the hearth of Greece, at Delphi; in the foundation stories of several Greek colonies, the founding colonists were first dedicated at Delphi.
The region of Delphi is typically Greek countryside: mountainous, with narrow roads. It's nice for hiking and cycling, especially in spring and fall as summer is really hot. Some hostels rent bikes.