In "His Visit: Day Six", on the day he says he's going to spend with his father, he just stands neaby and gazes. At the end of the day, he's suddenly in a wetsuit and (for lack of a better word) materializes in various places, finally to go surfing with Butchie and Shaun. A little web research says that facility is a Cold War era listening station. It wasn't clear what it listened for and if it had anything to do with space. It also seems that the spot might also be a place where a meteor struck at some point.