Highlight • Cave
Grjótagjá Cave
Hiking
4.9
(130)
Grjótagjá Cave and Hot Spring is a unique natural monument located in northeastern Iceland, nestled near the scenic Lake Mývatn. This small lava cave, situated at an elevation of approximately 281 meters, is renowned for its stunning geothermal hot spring within its depths. Formed by volcanic activity in the geologically active Mývatn region, it offers a fascinating glimpse into Iceland's dynamic landscape, positioned between the Krafla volcanic system and Lake Mývatn itself.
Visitors are consistently captivated by the mystical ambiance…
This Highlight is in a protected area
Please check local regulations for:
Mývatn og Laxá
Tips
July 2, 2017
Hiking
In the past it was even possible to swim in a cave, today it is forbidden.
Incidentally, this cave is also a location of the Season 3 series Game of Thrones: (ATTENTION SPOILER) when Jon Snow loses his innocence;)
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In the past you could bathe in the cave, today it is forbidden.
This cave is the shooting season of the season: (ATTENTION SPOILER) as Jon Snow loses his innocence;)
•August 26, 2019
Hiking
September 19, 2021
Hiking
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Nearby routes
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Details
Informations
Elevation 280 m
Weather
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Today
Saturday 28 March
-2°C
-8°C
68 %
Additional weather tips
Max wind speed: 22.0 km/h
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Frequently Asked Questions
Is it possible to swim or bathe in the Grjótagjá hot spring?
No, bathing in the Grjótagjá hot spring is strictly prohibited. While it was a popular bathing site in the past, volcanic activity between 1975 and 1984 caused the water temperature to rise significantly, at times exceeding 50°C (122°F). Although temperatures have since stabilized to more comfortable levels (typically 43-46°C), they remain unpredictable, and the prohibition is in place for visitor safety.
What is the best way to access Grjótagjá Cave, and is there parking available?
Grjótagjá Cave is easily accessible, located just a few kilometers east of Reykjahlíð and close to Iceland's main Ring Road (Route 1). Parking is available nearby, making it a convenient stop for those exploring the Lake Mývatn area. However, especially during peak season, the parking area can fill up quickly, so arriving earlier in the day is advisable.
Are there any hiking trails or routes directly associated with Grjótagjá Cave?
While Grjótagjá Cave itself is a short visit, it is situated in a region rich with hiking opportunities. You can find various routes and points of interest in the surrounding Mývatn region. Many visitors combine a visit to the cave with hikes around Lake Mývatn, the Dimmuborgir lava fields, or up to the Hverfjall crater, all of which are in close proximity.
How long should I plan for a visit to Grjótagjá Cave?
A visit to Grjótagjá Cave itself is relatively brief, typically taking about 15-30 minutes to explore the cave entrance, view the hot spring, and take photos. However, its proximity to other major attractions like Lake Mývatn, Dimmuborgir, and Namafjall means it's often part of a longer itinerary, so plan your overall time in the region accordingly.
Is Grjótagjá Cave suitable for families with children?
Yes, Grjótagjá Cave can be visited by families. The access is relatively easy, and the cave itself is small. However, the terrain around the cave is uneven lava rock, so children should be supervised, and sturdy footwear is recommended for everyone. The prohibition on bathing means there's no water play, but the unique geological features and Game of Thrones connection can be interesting for older children.
What are the seasonal changes like at Grjótagjá Cave, especially in winter?
Grjótagjá Cave can be visited year-round. In winter, the contrast of the warm, steaming cave against the snowy landscape is particularly striking and offers a unique photographic opportunity. While the surrounding trails might be covered in snow or ice, making hiking more challenging, the cave itself remains accessible. Always check local conditions and road closures if visiting during winter months.
What other natural features or landmarks are near Grjótagjá Cave?
Grjótagjá Cave is part of a geologically active and scenic region. Nearby natural features include the dramatic Dimmuborgir lava fields, the impressive Hverfjall crater, the vibrant Namafjall geothermal area, and the beautiful Lake Mývatn itself. These attractions are often combined into a single day trip or multi-day exploration of the Diamond Circle route.
What is the geological significance of Grjótagjá Cave?
Grjótagjá is a small lava cave formed by volcanic activity, specifically during an 18th-century lava flow. Its unique structure is due to its location on the Mid-Atlantic Ridge, a highly active area prone to volcanic eruptions. The cave's geothermal hot spring is a direct result of this geological activity, with water heated by the Earth's interior.
Are there any cafes, pubs, or accommodation options close to Grjótagjá Cave?
Grjótagjá Cave is located near the town of Reykjahlíð, which serves as a hub for the Lake Mývatn area. In Reykjahlíð, you'll find various accommodation options, including hotels and guesthouses, as well as cafes and restaurants. There are no direct facilities at the cave itself, so plan to get refreshments or find lodging in the nearby town.
Is Grjótagjá Cave dog-friendly?
Generally, dogs are allowed in outdoor natural areas in Iceland, but specific rules for caves and protected sites can vary. It's best to keep dogs on a leash and ensure they do not disturb the natural environment or other visitors. Given the uneven terrain and the small, enclosed nature of the cave, it might not be the most comfortable experience for all dogs.
How does Grjótagjá Cave compare to Mývatn Nature Bath?
Grjótagjá Cave offers a raw, natural experience where you can observe a geothermal hot spring within a lava cave, but bathing is prohibited. In contrast, the Mývatn Nature Bath is a developed geothermal spa offering a relaxing bathing experience in warm, mineral-rich waters, complete with facilities like changing rooms and showers. Both offer unique insights into Iceland's geothermal activity, but serve very different purposes for visitors.