Nonexistent Pier

The Child Protection Agreement was prepared and signed instantly, literally within two months: children need to be safeguarded from all the troubles happening in the world and educated in a way that they can resolve global conflicts. Children are the... future. And now Child Protection Bases have been built, separated from the rest of the world. Everything is well thought out.
The most progressive educational programs have been approved.
Children have gotten used to life on the Base. Parents could call the Base at a single emergency number. But for some reason, they did not call.
But is there anything left behind those concrete fences? And what world will the children enter when they turn eighteen? And why is the sea so beautiful there where it is forbidden to go out? And why is it forbidden?