 If you crave a change of environment, a day's outing to Formentera offers the bonus of a sea voyage.
If you wish to stay in the same environment, you can stay visit Formentera.
mnli hypothesis: If you wish to stay in the same environment, you can stay visit Formentera. premise:  If you crave a change of environment, a day's outing to Formentera offers the bonus of a sea voyage.