In Greek mythology, which creature is known for having three heads and guarding the underworld?

The creature known for having three heads and guarding the underworld in Greek mythology is Cerberus. Cerberus is often depicted as a fearsome dog with three heads, each representing a different aspect of the creature's personality or function. He is tasked with preventing the dead from leaving the underworld and keeping the living from entering, making him a significant figure in myths related to the afterlife.

Understanding the context of Cerberus’s role in mythology highlights his importance. He is often described as being fierce and loyal, and he plays a key role in various stories, such as those involving heroes who venture into the underworld. The other creatures listed, such as the Griffin, Minotaur, and Chimera, have different characteristics and roles in Greek mythology. The Griffin is typically a protector of treasure, the Minotaur is known for residing in the labyrinth and is a symbol of strength and savagery, while the Chimera is a monstrous fire-breathing hybrid creature. Each of these creatures serves distinct mythological functions and narratives, which further underscores why Cerberus stands out as the guardian of the underworld.