All of my old silver dollars came from parkways. I believe that's about the most common place to find them because parkways in older parts of towns were sometimes muddy spots where buggies parked and very early autos prior to the modern roadway and sidewalk. Lawns were just as neatly kept long ago, parks were well maintained also. So as most would agree, a silver dollar dropped there would have little chance of laying in one spot long enough to become a target for us today.
Having done miles of parkways both under construction and not, there are just some places where you can find evidence that a coin or two was dropped almost every year from the homesite's construction. Meanwhile in other areas where you would suppose this equation to be true there will sometimes be almost nothing but one or two older coins or one or two newer coins.
They are out there, you've got to hit the right spot to find them, like any other coinage or target you'd like to recover. Yep, old timers were careful with coinage in their pockets due their one or two experiences with holey pockets. Wrapping them in hankies or cloth or carrying a pocket purse. People were good at mending back then and quick learners, both things meant more than they seemingly sometimes today.
That's about all I've done before we got dumped on with snow which has now turned to about 3 inches of ice. 
