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.

Looking for an out-of-the-ordinary shark dive? Here are five you probably haven't heard about but should — plus 15 favorites we just can't get enough of.

Can submersible drones help make solo diving safer? Researchers are developing autonomous underwater drones to help assist solo divers and reduce accidents.

Residents of the Faroe Islands have slaughtered about 250 pilot whales in the last 24 hours, according to reports from Sea Shepherd and global media.

Lake Garda is a holiday hotspot for sun-seeking tourists, who come to sample the delicious local cuisine, the fine wines and the stunning scenery — and diving.

Scotland's Scapa Flow boasts one of the highest concentrations of diveable World War I wrecks in the world.

Germany's Lake Constance is a prime dive site for everyone, from raw novices to seasoned technical divers.

While the Weissensee is popular with swimmers and fishermen, it is also a hotspot for divers. There are numerous shore and boat dives available that show off a variety of underwater spectacles from this high-altitude lake — including submerged trees and huge carp, perch and pike.

Malta is renowned for its wreck diving, a sublime blend of genuine shipwrecks from wartime action or maritime mishaps and artificial reefs.