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Located near Lake Myvatn in northern Iceland, Grjotagja is another of Iceland’s hidden treasures. If you are a fan of Game of Thrones, you may recognize this lovely volcanic cave, which featured in Season Three of the popular series.

The cave contains a beautiful natural geo-thermal lake that was once a very popular swimming pool for the local people until recent volcanic activity (1975-1984) caused the water in the pool to become far too hot for swimming. Although water temperatures have returned to reasonable levels in recent years, swimming is now banned in the cave, but it is still worth a visit if you are in the area. Map

Rating: ⭐⭐⭐⭐⭐

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