New Arctic Adventures glacial discovery is now accessible
A newly revealed bright-blue ice cave on Langjökull glacier, named Neptune, is now accessible for guided snowmobile visits. Found in October 2025, the cave features high-clarity ice and delicate volcanic ash layers, offering travelers a safe, small-group way to experience one of this season’s most beautiful natural formations.
Arctic Adventures has announced the opening of a newly discovered natural ice formation on Langjökull glacier, REYKJAVÍK, ICELAND. Found in October 2025, the bright blue Neptune Ice Cave is now accessible on snowmobiling excursions from Reykjavík or Skjól basecamp. Tours run from November to April with guided access for safe and responsible exploration.
Langjökull is Iceland’s second-largest glacier and the closest ice cap to Reykjavik, reached by a scenic 2.5-hour drive. Each winter, guides find new ice formations shaped by meltwater and shifting ice. This year’s discovery is one of the most impressive in recent seasons. Neptune is a spacious, high-clarity blue chamber streaked with delicate layers of volcanic ash from historical eruptions. Its distinct, luminous color is what inspired the 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.”
Set your foot into the vivid blues of the 2025 Neptune Ice Cave in Iceland
Arctic Adventures has been working together with long-trusted partner Sleipnir Tours to secure the entrance and install subtle lighting to enhance visibility without disturbing the cave’s natural structure. Conditions are monitored daily to maintain safe visitation 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.
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