Did you know that St. Barths had a lagoon? It is located in an area called Grand Cul-de-Sac.
The waters are transparent, warm, and shallow: You can actually walk across the lagoon, with water rising just up to your waist.
The best place to enjoy the view on the lagoon is at La Gloriette. This is a very simple restaurant, with nice food and smiling waitresses.
I love going there, as I can sit at this restaurant with my feet in the sand, as some of the tables are right on the beach.
Tip: The place turns into a pizza joint at night, this is known mostly to locals. Go there during a full moon and enjoy a very romantic view of the lagoon by night.