Tag a symmetrical section of your land with spray paint so you can start digging the foundation. The base of your fireplace can be any shape -- just make sure that you set it up so that viewers on both sides of the fireplace will have a good view of the blaze.
Excavate 10 to 12 inches from the surface to provide a solid foundation. Fill the hole with cement, level it out with your trowel and allow the foundation to harden for at least 24 hours.
Place your cement blocks, bricks or stones on the foundation and stick them into place with cement. Put a heavy emphasis on creating a sturdy contour along the structure’s sides, as your fireplace will purposely be without two sides.
Furnish your two-sided fireplace with a metal log burner to hold firewood and a stylish metal or stone chimney topper. If you used concrete blocks, you can attach decorative stones or bricks to the exterior with cement.