You've just been convicted by the UN security council for being a Tildes user, and have been sentenced to 7 years in a penal colony, but you get a choice. Do you choose either:

1: Mars - 7 years without ever being able to go outside without a suit on, but afterwards you could travel back to Earth, if you desired.

2: New Mongolia: An Earth-like planet, almost as if Earth was new again. But it's a one way trip.

(Asking for a friend)