I wrote a bot that subtitles updated photos from a buoy in the Atlantic Ocean with trending topics from the web: https://twitter.com/subtitle_buoy
Behind the scenes the bot is looking up what people search for on Google at the moment (Google trends) and tries to match relevant sentences for a topic on Twitter. Most of the times the pieces of text are news headlines, occasionally spam or deliberately spread disinformation.
The imagery comes from the National Data Buoy Center.
It’s also a Tumblr: http://subtitlebuoy.tumblr.com