So much land... but so little "open" land.
Edit: The US has a higher population density number than I thought: 36 people per km^2. Still, it's not far that away from Sweden's 25 people people per km^2. Norway: 15 people per km^2, Finland: 18.
These scandinavian countries have a https://en.wikipedia.org/wiki/Freedom_to_roam - of course it's culturally quite different in the US for historic reasons, but.. it just seems so weird to have opening hours to the nature.
If it was culturally/legally possible to step-by-step implement something like this in the US, I think it would be a great thing. I do see the challenges.