Over at The Awl (Update 22 Sep 2018: 404’d now 😢), John Herrman compiled an excellent list of links that will send you to various random places on the web—Wikipedia articles, full-screen GIFs, Google Earth locations, Metafilter questions, Wikipedia in Esperanto, and more—when you open a new browser tab. I’ve been doing this for a half hour and it’s oddly mesmerizing.
Even better is this little widget by Yoz Grahame that randomly chooses from one of John Herrman’s randomizers. That page includes solid instructions for getting this set up in your browser of choice.