Billed as the largest, deepest, and darkest motel room in the world, the Underground Cave Suite is not for the faint-hearted. It’s tucked almost 220 feet (67m) below the Grand Canyon and is surprisingly luxurious, with a flatscreen TV, library of old books and magazines, record player and comfy sofas – all contained within walls that are around 65 million years old. There are rooms available above ground too, though this one is definitely the most fun.

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