Sanborn Fire Insurance Maps (historical, detailed information in cities and towns) can be found in microform section in 1st floor, Wing C in Fewnick Library and the digital version covering the areas of DC, VA, DE, CO, MT, NM (1867-1970) is available through the database portal. It's a great resource for genealogy research by browsing the neighborhoods where family and friends lived. See the entire online Sanborn Map Collection (via LC) and the guide to use the online (UWM).
To find atlases and maps at Mason, use Keyword search with "Atlas (or maps) AND "india" (a place name) as example.
To find all map (or atlas) collection in the libraries, use the catalog and search keyword (atlas and world), then use " Set Limit" function (=search limits) and choose, "Map" as medium.