Building Ages of Ridgewood Queens (MapPluto Data) Note: Structures built between 1800s and early 1900s usually have a Year Built date of either 1910 or 1920.
City of Lake Wales, Florida: Land Cover Types (NLCD 2011 Data)
MapBox Style: World Tripoints (the meeting point of 3 or more borders)
Earth Impact Craters: The Earth Impact Database (EID) comprises a list of confirmed impact structures from around the world. To date, there are 190 confirmed impact structures in the database. http://arcg.is/1HCGea
Various curiosity-driven projects. Updated periodically!