Fire pits in the ground can be as basic as a hole excavated in the ground or as sophisticated as a fire brick-lined pit constructed into a formal patio. Follow the same guidelines for locating an underground fire pit as you would for any other fire pit, ensuring that it is at least 20 feet away from any neighboring structures, shrubs, or overhanging trees. The floor of the pit should be flat and solid. There should be no water sources within sight, sound, or reach of the pit. The best part is that you can customize an underground fire pit to fit your style and fit your budget. You can create a beautiful centerpiece for your yard or garden by adding decorative stones or masonry pieces. If you want to save some money, but still want something unique, consider using concrete instead. This material is easy to work with and can be stained or painted to match your home's exterior color scheme. The options are endless when it comes to building an underground fire pit. As long as you follow safety precautions, you should have no problem creating a wonderful outdoor space for you and your family to enjoy.