You can find this reef, and others, if you look along the coast of Hawaii.
If you type in, Bahamas, it will take you to a group of islands that are in the Caribbean sea. After that look around the coast of them.
If you type in Tahiti, then, after it takes you there, look along the coast line.
Bora Bora has a huge reef surounding it, it's really cool. You can find it by just typing it in!