8 Caves Every Adventure-Seeking Traveler Should Visit
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3. Saalfeld Fairy Grottoes, Germany
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These German caves are known for their impressive colors, even declared the ‘most colorful grottoes in the world’ by the Guinness Book of Records. Once mined for shale, today they’re open to visitors, and one of the caverns is illuminated by lights to enhance the colors in the rock, which are caused by mineral deposits.
