north iceland
Grjótagjá
About Grjótagjá
Grjótagjá is a remarkable volcanic in Iceland. Grjótagjá is a remarkable volcanic wonder in North Iceland. This dramatic landscape was shaped by powerful volcanic forces over thousands of years. Vi... Grjótagjá is a small but spectacular lava tube cave at Lake Mývatn, famous for its crystalline turquoise geothermal pool inside the cave. The cave became internationally famous after appearing in Game of Thrones (Season 3) as the location where Jon S. This location offers visitors a unique opportunity to experience Iceland's natural beauty and cultural heritage.
🐉 Legends of Grjótagjá
Grjótagjá has been part of Icelandic folklore for generations. Local tales speak of hidden people (huldufólk) and other supernatural beings who inhabit the area. According to tradition, this place deserves respect and visitors should be mindful of the ancient spirits who call it home.
📖 History
La historia de Grjótagjá está profundamente arraigada en el patrimonio islandés. La actividad volcánica ha moldeado este paisaje a lo largo del tiempo. A lo largo de los años, ha sido testigo de numerosos eventos históricos y continúa siendo un sitio de importancia cultural. Las tradiciones y leyendas asociadas con este lugar se han transmitido de generación en generación.
✈️ Why Visit
Featured in Game of Thrones as Jon Snow and Ygritte's cave
💡 Did You Know?
Bathing is prohibited due to dangerously high water temperature
Key Facts
Water temperature approximately 43–46°C — too hot for bathing
Bathing was disrupted when Krafla eruptions raised temperature to 50°C in the 1970s
Featured in Game of Thrones Season 3 (2013)
The cave is a tectonic fissure between the North American and Eurasian plates
Short walk from Lake Mývatn
🕐 Best Time
Year-round (viewing only — bathing prohibited since the 1970s Krafla eruptions raised water temperature)
🚗 Access
Off Route 860 near Mývatn. Short walk from parking.
⏱ Duration
15–20 minutes
📍 GPS Location
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