My father and I built a wood burning pizza oven in his backyard. After he retired he got really into cooking and one day he decided that he wanted a real, authentic pizza oven. The only easy way to incorporate one into his home was to build it in the backyard.
He had done all the planning and purchased all the materials. He only called me when he needed extra hands to put it together. It took the better part of a day but it was not a grueling job. And definitely worth it. The pizza that comes out of that oven is some of the best I have ever had.