Insight into the behavior of these sharks allows scientists to better understand the threats they face.

These ice-diving photos may seem crazy, but divers with the right training are quick to fall in love with this style of scuba diving. See what you're missing!

The amazing story and photos from the underwater exploration of Imperial Russia’s frigate Oleg shipwreck by National Geographic photographer Viktor Lyagushkin.

Dive in to adventure with tiger sharks in Fiji, hammerheads in the Galapagos, Humboldt squid in Mexico's Sea of Cortez and 8 more insane spots for big-animal scuba diving.

Ready to test your tec-diving skills? These shipwrecks from around the world are as advanced as it gets, but exploring their hidden treasures is an experience like no other.

Each of the shipwrecks in Malta — many from World War I and World War II — has a story to tell, but to learn the secrets you have to don your scuba gear.

From Great Britain to Palau, the Baltic to the Red seas and Truk Lagoon — wherever you find wrecks, you'll find scuba divers. Here are some of our favorites!

The video "Haven" features three world-record holding freedivers exploring wrecks and the deep blue Mediterranean Sea. You've gotta see this.

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