There are scores of shipwrecks in the Great Lakes that scuba divers can explore, but these photos present them in a new light.

Photojournalist Jill Heinerth surveys the fragile marine habitat in the Arctic, where melting sea ice has an ecosystem hanging in the balance.

Budapest, where historic thermal baths derive their heat from natural springs deep in the Molnár János Cave.

South Africa's Sardine Run is becoming increasingly hard to pinpoint but one photographer and his crew refuse to give up on the chase.

Iceland shelters many unknown and never-dived spots, plus a few special places that can be dived endlessly, always presenting something new.

Bell Island Mine is an underwater time capsule of a Canadian isle's heroic struggle to support a war effort while protecting a now-lost culture and way of life.

Divers at this famous Iceland site can touch the walls of the Eurasian and North American continental plates.

We dived with the expert shark handlers and resident marine biologist at Fiji’s Beqa Lagoon Resort and it was wild— in the best possible way!

It’s a tropical eastern Pacific island so remote, it seems untouched by time and man, offering underwater thrills unmatched in this hemisphere.