See why the scuba diving on North America's Pacific coast — from Alaska to Washington to California and Mexico — is among the best in the world.

From pelagic animals and tiny underwater critters to magnificent underwater structures and even an underwater museum, these 15 sights are best viewed by scuba divers.

A pod of orcas, or killer whales, delighted freedivers off the coast of Cabo San Lucas, Mexico. The divers snapped some amazing photos and video of the rare encounter.

*Scuba Diving* Magazine's readers voted for the world's best destinations for advanced divers.

The best dive destinations with no scuba tank required. Swim with whales in Norway, Tonga and Sri Lanka or grab your freediving gear and head to Australia to dive with fur seals.

These six daredevil dives promise the thrill of a lifetime — from shark encounters in the Caribbean to crocodiles and sea snakes in the Indian and Pacific.

Judy G's photography showcases the marine life you can expect to see underwater on the famed reefs of Mexico's largest Caribbean island, Cozumel.

As dedicated cave/cavern instructors and guides, we are willing to share the beauty of the Riviera Maya underwater cave/cavern systems, providing an enjoyable, safe and unique cave/cavern experience.

Presenting the 2017 readers choice awards for best overall scuba diving in the Caribbean and Atlantic Ocean.