On a rainy afternoon in Bora Bora, one of the best things to do is to visit the Bora Bora Lagoonarium. This unique attraction offers visitors the opportunity to get up close and personal with a variety of marine life. You can snorkel or take a guided tour to explore the lagoonarium's vibrant coral gardens and swim alongside colorful fish, rays, and even sharks. It's a great way to spend a rainy day while still enjoying the beauty of Bora Bora's underwater world.