Entering the Cave of Trophonius was an expression in the Classical World for experiences of extreme terror, and it stemmed from a real oracle in Greece, called the Oracle of Trophonius. Unlike other oracles, such as the Oracle at Delphi, where one spoke to the oracle who in turn was in touch with the gods, when speaking to the Oracle of Trophonius, apparently, one spoke to the gods themselves, and had an experience unlike any other