Here in the US, there are lots of illegal places to camp too. Often, trails limit camping to designated sites only. Usually those are fine, but not always. Sometimes, you just can't make it to one and feel like stopping for the day. I like to disappear in those situations, not so much to disregard regulations mind you, I just have some mobility issues and can't make the distances that most hikers can. If I run out of energy, that's where I stay. Best to disappear from view, the less obvious the better.