A sign in Erie, Colorado. just off countyline road. Quite a contrast to the policy of "everyman's right" in Sweden - you can be on anybodies property, even camp, as long as you're more than around 100 yards from a residence and don't damage or litter the property. This is called allemansrätten in Swedish.
Of course, in Sweden, if some one, say a child, drowned in the pond, there would be no lawsuits in Sweden.