History is a pretty much endless well in this regard. Pick some era or focus, and read the major wikipedia articles on it. For example the Franco-Prussian War o

History is a pretty much endless well in this regard. Pick some era or focus, and read the major wikipedia articles on it. For example the Franco-Prussian War or the reign of Augustus or the early history of vaccinations. In 60 minutes, you can pretty much become more educated on about a specific historical event than 95% of people you'll meet.