Story maps are powerful tools for visualizing geographic information. This example that compares 1930 and 2015 aerial images of New Jersey uses the Spy Glass template.
In the next example, I use data layers from other authors, posted on ArcGIS Online, to develop a story map of food insecurity in Yemen.
The following example compares New Jersey aerial photography for 2007 and 2015 – notice the remarkable coastal changes around Sandy Hook, largely induced by Hurricane Sandy.