No other Roman emperor travelled as much as Hadrian (r. 117-138 CE). The 'restless' emperor spent more time travelling than in Rome, devoting half of his 21-year reign to the inspection of the provinces. His travels provided him with the political means of unifying the Roman Empire, but he may also have been personally motivated by his insatiable curiosity, philhellenism, and love of travel.
This is a companion discussion topic for the original content at https://www.worldhistory.org/article/1892/hadrians-travels/.