score:3
It depends on how are you traveling with, but in general, I would visit the Blow Hole or I would go to La Regata which is one of the best restaurants on the island with a perfect view of the sea.
It will be lunch time so eating is a nice alternative, however, the Blow Hole is a natural spot that I really like, it's on the other side of the island from the airport but it's a small so it's only a 35 minutes ride from one side to the other.
Beaches are also nice, just remember, it's a small island, there is a marathon around the island, the winners last around 3.5 hours