This is a map created by Mark Junker using Google My Maps to summarize his environmental and historical files. Note that he used Google My Maps to share this map and that it does not include any culturally sensitive information. For a tutorial on how to make a map like this go to Google My Maps NEPA mashup
You can download map layers in KML/KMZ format from many government websites. This demo shows you how to look up tribal locations, map Brownfields and download a KML file that you can open in Google Earth Pro to add to your own maps.
You can use the time slider in Google Earth Pro to pull up imagery from different dates. This will allow you to look at what was previously on a property, as well as climate-related disaster impacts such as flooding.
A simple way to make a tour is to use a screen recording software like Quicktime to record just the map window on your Google Earth Pro while you click through your sites on the My Places panel. If you carefully organize your locations and popups in the My Places panel it will make it easy to manage. You can use Edit>Snapshot view to set the altitude and view for each location so that when you click on it the map automatically zooms to the view you want to show.
This is just a small sample of the type of data that you can get from NOAA
National Weather Service Weather Prediction Center data downloads in KML format
Storm Prediction Center KML downloads
Examples of data sources you can use for NEPA analyses
EPA Cleanups in My Community website
Indigenous Mapping Icons - Northern Hemisphere & Amazon
Indigenous Mapping Icons - Australia