I urge you to visit this website and familiarize yourself with it as a tool for exploration.
I spend a lot of time using it to pick good places to explore. It is hard only because, around suburban Boston, much of the land area is no longer woodland. So go to the website, type in the name of your town or an area nearby and see if there are not some woods and brooks and hills to check. Around here it is almost guaranteed you find things this way - nothing complicated about it except the willigness to go look.