After a hollow was dug for an alfresco living room and protected fire pit, the feature was reinforced with concrete walls and given character with 8 ton rocks that were lowered into place with a crane. The bowl shaped pit came from Woodland Direct.
This house was one of three chosen by a couple on HGTV's "Fixer Upper", based out of Waco, TX. Chip and Joanna Gaines redid the house from top to bottom. I love what they do, and I'll hopefully talk them into redoing a house for me someday :-)