Place I Live is a helpful platform for exploring neighborhoods. You can go through various categories on the maps to discover how safety or community in the area is. If you have ever been in the area you can also leave comments for others to see.
If you are looking for historic houses locations in New York City, you can access them in this page. New York City is rich with history and another place to see it apart from the museums could be the historic houses where you can experience the history almost first hand. You can view where they are on the map.