The Greek hero Theseus is known for accomplishing several heroic feats, most notably his slaying of the Minotaur. This legendary creature resided in the labyrinth of Crete, consuming youths sent as tribute. Theseus volunteered to enter the labyrinth and, with the help of Ariadne, who provided him with a thread to navigate, successfully defeated the Minotaur. His actions symbolize bravery, intelligence, and the triumph of good over evil, establishing him as a celebrated hero in Greek mythology and illustrating the archetypal hero's journey.