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Inside Langjökull: The World’s Largest Ice Tunnel — Day Tour from Reykjavík
10-hour day tour from Reykjavik into the world’s largest man-made ice tunnel inside Langjökull glacier. Monster truck across the glacier, Deildartunguhver hot spring, Hraunfossar waterfalls, Icelandic horse farm. Important: go to Bus Stop #12 rather than hotel pickup. 4.5/5, 81 reviews. From $297.65.