Very cool new visualization of Laniakea: Our Home Supercluster, which is the supercluster of galaxies that includes the Milky Way. Check out the video and article from Nature.com.
This is potentially the most detailed map of the universe to date, and spans more than 500 million light-years and contains more than 100,000 galaxies. The lines shown in the visualization the paths of motion of the individual galaxies.