In a captive situation, a box turtle can live in an indoor habitat or an outdoor habitat. No matter where you are keeping your box turtle, it is always mandatory to decorate the pen in a proper way. For many box turtle species, an outdoor pen is the best. I have been keeping box turtles for many years, and I have tried both outdoor and indoor habitat for them. From my experience, I know how to build an outdoor pen, what problems we can face, and how to solve them.