4 Great Sand Dunes National Park Colorado ThinkstockPhotos-539245358.jpg

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The park has North America’s tallest sand dunes. It’s the height of these dunes that make them the perfect place for some UFO sightings, and many have been reported, over 60 since 2000. The area made national headlines in the 1970s with a rash of cattle mutilations, which seem to continue. There is a UFO Watchtower where you can look to the sky for strange lights.