Search the map for Open Spaces and Projects

I am interested in finding a way to conduct the search for defined open spaces and projects in map view instead of just using the search field. I often browse observations by a defined area that isn’t easy to conduct with a simple square or circle selection. Defining open spaces and projects is not only a bit complicated, I wouldn’t want to duplicate someone else’s efforts. Does this method exist? A way to view the map to see where existing public projects and open spaces are instead of using keyword searches? TIA