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Explore Gjábakkahellir Lava Tube, Iceland (UNESCO site)

Gjábakkahellir is a 360 meter long lava tube located in the UNESCO World Heritage-listed Þingvellir National Park and is best visited in the summer months. Enter Gjábakkahellir and discover the marvels that volcanic activity has created about 9,000 years ago; the cave is a perfect example of an Icelandic lava tube and is situated in one of the most active...