i go to random Idiots In Cars videos on youtube, go to a random section of the video and attempt to find that place on google earth. once i did this a day before a test and wasted 2 hours
Sometimes when I'm bored I just look around Google Maps until I find some cool-looking island in the Arctic Circle or something and then fall down a 2-hour Wikipedia rabbit hole about that one specific place
Then, two hours later, I know the entire history of some random hunk of freezing rock in the middle of nowhere