The YO-257, a 175-foot long navy oiler, sits on the sand in 100-feet of water off the south shore of Oahu. You’ll have a breathtaking view of Diamond Head on your boat ride to this wreck.

Taking a visit to the Big Island of Hawaii? You'll want to check out these scuba diving sites and topside activities.

Travel to the Big Island of Hawaii — where humpback, pilot, beaked and sperm whales come to mate — on the Kona Aggressor II liveaboard.

*Scuba Diving* magazine readers voted Florida, Bonaire and Hawaii the best scuba diving destinations for beginners.

More than 10,000 North Pacific humpback whales migrate from southeastern Alaska to the warm waters of the Aloha State each year to mate, give birth and nurture their calves.

The volcanic islands that make up Hawaii are a magnet for mantas, sharks, one-of-a-kind fish life — and scuba divers.

The tale of two shipwrecks. Learn how a replica whaleship and museum ended up as an artificial reef and scuba diving site.

Two wrecks and a sub add up to a great morning of diving in Oahu, Hawaii.

The NOAA ship *Oscar Elton Sette* is on a 24-day research expedition to monitor, study and help the endangered species.