DAVÍÐSGJÁ

The Davíðsgjá Dive Tour drops you into one of Iceland's lesser-known underwater fissures: a deep, narrow rift beneath Lake Þingvallavatn that local divers quietly rate among the country's finest. A short drive from Silfra inside Þingvellir National Park, Davíðsgjá rewards dry-suit divers with glassy water, towering basalt walls and resident brown trout, all on a relaxed, self-drive half-day.