Define “best”...if you are a new operator and are looking for success in finding old coins right away, PRIVATE property in old sections of a city will be your best shot. Any “good areas” of public land have been hunted for the last 45 years by everyone else, and as you go, you’ll realize what you’re up against. Old coins are out there...somewhere. You have to be one very wily coyote to find them. Watching posts of people finding old coins all the time will lead you to believe it is easy. It is not. Just a reality check....good luck.