Travel literature
Explanation:
Beowolf is an epic written in Old English about a hero who travels to faraway lands on an adventure to defeat a big creature of which he is destined, This journey is his struggle against mortality.
The whole traveled journey plays into the motif of a quest or a voyage which is integral to travel literature of the early days and as such is a significant part of the body of work that became to be classified as travel literature later on in time.