Most Washingtonians have no idea what these stones are, even though they pass by them every day. But some people make a pilgrimage to visit them, providing a fascinating exploration of DC's varied neighbourhoods. Many are on people's property, and several are in parks. You'll find them in the middle of a roadway median, in a cemetery and at the base of a water tower. (Note that land seized by the Federal government in 1790 was returned to Virginia in 1846, so the stones don't reflect DC's modern, reduced border.)