Micronesia. The name alone is magic to divers' ears. But to the rest of the world, it's practically unknown. Here's why divers want to keep it that way.

Once the secret weapon of the U.S. Navy, the fourth-largest atoll in the world is now open for diving.

Sublime drop-offs and macabre wrecks make Palau and Truk Lagoon a glorious study in contrasts.