We continue on to the legendary sacred area of Delphi, known in ancient times as the "navel of the world". This legend was started when Zeus told two eagles to fly to the center of the earth. They took off in opposite directions and met here at Delphi. It was the site of the Delphic oracle which was the most important oracle in the classical Greek world and became the major site for the worship of the god Apollo. The site of Delphi encompasses the Castalia Spring which is constant, the monument to the Argive Kings, the Athenians Stoa which was a tribute to their victory against the Persians, and the Polygonal Wall. You'll see the Temple of Apollo which housed the Oracle and its considerable influence throughout Greece and the world. Many leaders from around the world came to ask and receive answers before any major undertakings.
Also, in the complex is the Delphi museum which showcases the magnitude of wealth and sophistication of Delphi. Make sure your guide shows you the famous bronze Charioteer treasure, originally created to commemorate a victory during the 476 BC Pythian Games which were held every 4 years in Delphi and were the precursor to the Olympics.