I gave this presentation at Workshop on Interactive Language Learning, Visualization, and Interfaces / ACL 2014 in Baltimore, MD on June 27, 2014. http://nlp.stanford.edu/events/illvi2014/index.html ABSTRACT Everyday on Twitter, there are millions of thoughts that are captured and shared to the world in the form of 140-character messages, or Tweets. There are many things we could learn from these thoughts if we could figure out a way to digest this gigantic dataset. Visualization is one of the many ways to extract information from these Tweets. In this presentation, I will talk about several visualizations based on Tweets, as well as share experiences and challenges from working with Tweet data.