Final answer:
King Arthur believed that the barge would take him to the Isle of Avalon, where he could either heal or find peace in death, according to different interpretations of the Arthurian legends.
Step-by-step explanation:
The question refers to the legendary figure King Arthur and asks where he believed the barge would take him. In the legends and tales of Arthurian lore, upon being mortally wounded, Arthur is taken to the mythical isle of Avalon aboard a barge. This island is thought to be a place where he could heal and eventually return from, although there are various interpretations. Some stories suggest that Avalon is a final resting place, a sort of paradise where Arthur is taken to die peacefully, while others view it as a place of healing where he might eventually recover and return to aid his kingdom in a time of need.