Why does Ulysses have to visit Tartarus Land of the Dead?

Ulysses visits Tartarus, the Land of the Dead, in order to seek guidance from the prophet Tiresias, who offers critical advice for his journey home. This visit is essential for understanding the challenges he will face and how to appease the gods, particularly Poseidon, to ensure a safe return to Ithaca. Additionally, encountering the spirits of the dead allows Ulysses to gain insight into his past and the consequences of his actions, reinforcing themes of fate and mortality in the epic.