A striking new natural ice formation has opened to visitors in Iceland, as Arctic Adventures confirms guided access to the Neptune Ice Cave on Langjökull glacier. Unearthed in October 2025, the brilliant blue chamber is now available to explore on snowmobile tours departing from Reykjavík or the Skjól basecamp, with excursions running from November to April.
Langjökull, Iceland’s second-largest glacier and the nearest ice cap to the capital, is reached via a scenic 2.5-hour journey. Each winter brings freshly formed meltwater passages and ice chambers, but this season’s find stands out for its clarity and dramatic colour. Neptune features expansive blue ice lined with fine bands of volcanic ash from historical eruptions, creating a vivid interior that inspired its name.
“The name came to us immediately,” says Hekla Tang, Operations Manager at Arctic Adventures. “Under certain light, the ice mirrors pure Neptune topaz. Everyone agreed the moment we stepped inside.”
Arctic Adventures, working with long-standing partner Sleipnir Tours, has secured safe entry to the cave and introduced discreet lighting to improve visibility while preserving the natural surroundings. Conditions are closely monitored each day to ensure safe small-group visits throughout the season.
What to Expect on the Neptune Ice Cave Tour
· Convenient pick-up from Reykjavík or meet-up at Skjól Basecamp near Gullfoss Waterfall.
· Super Jeep transfer to Langjökull glacier through the Highlands of Iceland.
· An exhilarating snowmobile ride on Langjökull glacier’s white expanse.
· Guided entry into the newly opened natural ice cave.
· Certified glacier guides and snowmobile safety gear (helmet, overalls, gloves).
From November to April, you can pair the Neptune Ice Cave with the Northern Lights hunt. After exploring the cave, enjoy warm cocoa, expert guidance, and free photos as you search for Iceland’s night-sky spectacle.
Tours last from 4 to 10 hours, depending on the selected starting point. With Northern Lights combinations, the trip extends up to 16 hours. Neptune Ice Cave excursions are of moderate difficulty, require a basic level of fitness, and are suitable for children aged 8 years and older.
See the Neptune Ice Cave While It’s at Its Best
Neptune Cave is a seasonal formation, and its appearance will evolve as winter progresses before it likely melts in late spring. Guests visiting early in the season can experience its colors and clarity at their peak.
