Delphi

Delphi

 * What** Delphi- site of Delphi oracle, which was one of the most important oracles of the Greek world. Dedicated to Apollo

__**Why**__ Highly regarded by many; often consulted before major battles, etc. (see Herodotus)
 * Where** Greece

For example, the Delphi told the Spartans that either their king or their city would be destroyed, this came true in the Battle of Thermopylae when King Leonidas was killed.