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A warm geothermal lagoon on Iceland’s Diamond Circle. Bubbling sands, vibrant algae, and unique wildlife create an unforgettable underwater adventure.

Litlaá, meaning “Little River” in Icelandic, is a geothermal wonder near Iceland’s northern coast, just south of the Arctic Circle. While warm waters are rare in this region, the geothermal activity here creates a magical spot for snorkeling in water that’s around 20°C. Its shallow nature makes snorkeling the perfect way to explore this otherworldly lagoon.

Tours in this area take place in Brunnar (Icelandic for “Wells”), a lagoon fed by two sources: warm water from nearby geothermal springs and cold freshwater bubbling up from wells at the lagoon’s bottom. The underwater scenery is mesmerizing, with dancing sands that look like miniature eruptions or serene beaches. Known as the “Bubbling Sands,” these formations create patterns so surreal they might leave even seasoned divers questioning their senses!

Adding to the charm are fields of vibrant green algae, colorful sediments, and countless snails scattered across the lagoon. In the shallows, you’ll spot schools of sticklebacks darting between the rocks, while lucky snorkelers might glimpse the majestic Brown Trout, a predator of these tiny fish.

Litlaá lagoon is part of the renowned Diamond Circle route, along with other must-visit destinations like Ásbyrgi Canyon, Goðafoss (Waterfall of the Gods), Dettifoss, and Lake Mývatn. Whether you’re an adventurer or nature lover, this geothermal gem is an experience you’ll never forget!

Related tours

2.5 hours

Bubbling Sands Snorkeling Tour

Discover Litlaá, a geothermal river near Iceland's Arctic Circle, where warm waters and bubbling sands create a mesmerizing snorkeling experience.

From €145/person

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