Earlier quoted context omitted.
There are plenty of areas open to the public that are accessible to children: playgrounds, libraries, schoolyards, skateparks, large underused parking lots, malls, public pools. Some places have great nature nearby: beaches, creeks, rivers, hills, and mountains. Some of those are more dangerous than others, but they are all accessible if the parent allows it.
In the US, if the children in question are under 12 and going to any of those places unsupervised, they're likely to get the police and/or CPS called on them.
The other cool thing is all the natural parks and outdoor activities (skiing, biking, climbing.)
The downsides are the utter lack of nightlife (not really my jam anyway, but whatever) and all the damn Mormons (I am one.)