Note: Several of these sites require that you register before you can enter and explore. Lawyers are getting in on the act, too. If you live near an historic site overseen by the National Park Service, you could become a licensed guide with the Association of Licensed Battlefield Guides. If you fancy yourself a skilled photographer, you can also earn extra cash by selling photos to stock art sites such as iStock by Getty Images and Shutterstock. Working folks will pay plenty for you to take mutts W.
