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

Scuba diving the caves in Missouri’s ever-changing Roubidoux Spring is a thrilling opportunity for discovery every time. Find out how to become an explorer!

It's the underwater encounter of a lifetime: diving with Narwhals in the High Arctic. Read how this photographer befriended these marine mammals.

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.

In the mighty Amazon, giant snakes, vicious piranhas, prehistoric reptiles, and other fearsome creatures wait in the fresh water. Welcome to Brazil.

Brazil is full of monsters. In the Amazon giant snakes, vicious piranhas, prehistoric reptiles, mysterious shapeshifters and other creatures await scuba divers.

Tahiti — romantic, beautiful and a diver's paradise — is one of the best places in the world to dive, and is filled with sharks, dolphins, coral reefs and more.

Hammered by Norse gods of old, Iceland's mirror lakes conceal a spreading rift below, a molten gash that cuts to the very center of the Earth.

What you don't know about swimming with oceanic whitetip sharks won't hurt you — right? Find out about diving with these fish in the Bahamas.