Stake a claim on the last unknown frontier: It lies just beneath our feet. The wonders of scuba diving in caves.

You say you want a revolution...

One of our most coveted awards: Find out which operators, resorts and liveaboards made our Top 100 Gold List!

In Trondheim, Norway, divers brave dark, bone-chilling waters to enter an alien world full of pristine wrecks and a unique reef found nowhere else on Earth/

These eight destinations will change the way you look at diving in the Old World

Cold water (65 degrees in August, mid-40s during the fall and spring), craggy topography, prevailing winds and unpredictable tides can make diving in Scotland a bit challenging for the uninitiated. The water temperatures are warmest June ...

The small fishing village of L’Estartit on Spain’s Costa Brava is the jumping-off point for the islands, which sits less than a mile offshore. The town’s many dive centers –– including La Sirena and Oceansub –– offer year-round diving at around ...

Make it Happen You can dive year-round in Norway, and while a 7 mm wetsuit is usually sufficient in the summer months, you’ll want a drysuit for winter. Strømsholmen Sjøsportsenter offers orca safaris in January and February that include six ...

Make it Happen You can dive year-round in Tenerife, but for the best conditions, wait until September when the peak season crowds have left. Island Divers in Tenerife offers packages of eight dives for $320, with accommodations in one-bedroom ...