Take a Non-Credit Class at a Local College

Check out your local colleges in your area for non-credit classes. Many things are offered, and you can even contact them with an idea for a class, and teach one yourself. Things include writing, painting, drawing, cooking, travel, geology, foreign language, etc. I took a glacial geology class, and we met one night to better understand more about the subject, then spent the following Saturday driving around the county, looking at drumlins and kettles. I got tons of brochures, maps, and resources for local parks and trails that i've not been to before, where I can go on future adventures by myself.