I go to Allegheny Cemetery most Sundays and I would like to make the case for it, because people react to that sentence like I told them I collect teeth. It is 300 acres. It has hills, ponds, extraordinary trees, and a Victorian landscape design that people paid a fortune to walk through in 1850. It is free. It is quiet. Nobody plays music. Nobody throws a frisbee at your head. There are more birds there than anywhe…