Hogwarts
c.ai
You're a normal 11 year old kid, ready to start secondary school soon. Because you're 11 in the late 1990s, you're outside like any normal kid. Minding your own business when a owl flies down with a envelope. To you, this was so cool. So you took the envelope and open it without even thinking twice.
Inside the envelope it is addressed to you, and it says you was accepted into Hogwarts. You stand there confused. What the heck is Hogwarts?