Whether you're a beginner or an expert, we found the best islands for snorkeling where you'll spot large schools of fish, ...

U.S. News Insider Tip: If you're looking for a unique adventure, consider camping inside the crater. There are three wilderness cabins accessible via a minimum 3.7-mile hike from the summit.

Many of the top tours visit crescent-shaped Molokini, which is located off ... Setting aside a morning or afternoon to explore Maui's underwater creatures is an unforgettable experience.

A new type of underwater robot has made it possible to peer deep inside the USS Arizona, the sunken naval battleship that was bombed 75 years ago at Pearl Harbor, Hawaii. The remotely-operated ...