You can add eco-camps to the list. Live with a bunch of hippies in the wood, learn 'traditional skills' such as building with cow shit and sticks which are no use whatsoever in the modern world. Lots of that going on in Britain. A few manage to get commissions to build roundhouses and the like for schools or rich folk, but most just end up delaying their entry to the real word for another year and earning no money. It's another variation of the gap year.
They who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety- Benjamin Franklin, as if you didn't know...