I've been to Delphi twice and loved it both times. The first time I went, I stayed in the little town and it was so lovely. The people were so kind, the views were incredible, and it was so peaceful. The most recent trip I took there we did a short day trip from Athens. It made for a long day but it was totally worth it. The archeological site is incredible as is the history. But the views will also blow you away. Make sure you have lunch in the little town. You'll be smitten with the lovely people, incredibly fresh food, and the beauty of this small town hidden in the mountains. If you have a little more time on your hands, try to visit the Hosios Loukas Monastery. It's in another small town close to Delphi but it's so beautiful and still an active monastery today!
I would not recommend visiting this place during Summer as the heat can be unbearable. You have to walk quite a bit to the top to get a nice view of the entire compound. Bring hats and water!
After the Acropolis, Delphi is the most popular archaeological site in Greece.A trip to Delphi is listed in just about every tour itinerary and is by far the most popular day trip . Many people don't even know why they are going to Delphi. It's just something they know they are supposed to do when they go to Greece.
At the foot of Mount Parnassos, within the angle formed by the twin rocks of the Phaedriades, lies the Pan-Hellenic sanctuary of Delphi, which had the most famous oracle of ancient Greece. Delphi was regarded as the centre of the world. According to mythology, it is here that the two eagles sent out by Zeus from the ends of the universe to find the navel of the world met. The sanctuary of Delphi, set within a most spectacular landscape, was for many centuries the cultural and religious centre and symbol of unity for the Hellenic world. The earliest finds in the area of Delphi, which date to the Neolithic period (4000 BC), come from the Korykeion Andron, a cave on Parnassos, where the first rituals took place. The remains of a Mycenaean settlement and cemetery were discovered within the sanctuary, but traces of occupation are rare and very fragmentary until the eighth century BC, when the cult of Apollo was established and the development of the sanctuary and the oracle began. The first stone temples of Apollo and Athena, who was also officially venerated under the name of “Pronaia” or “Pronoia” and had her own sanctuary, were built towards the end of the seventh century BC. According to literary and archaeological evidence other gods were associated with the sanctuary; these included Artemis, Poseidon, Dionysus, Hermes, Zeus Polieus, Hygeia and Eileithyia.