Fireplace shelves, also known as 'HOBS' (4 letters), are shelves that are built into the sides of a fireplace. They are typically used to store firewood and other items related to the fireplace. Fireplace shelves can be made from a variety of materials, including stone, brick, and wood. They are often decorated with carvings or other decorative elements. Fireplace shelves provide a convenient way to store items near the fireplace, while also adding a decorative touch to the room.