Grand Canyon, Horseshoe Bend, other national parks overwhelmed by Insta-crowds I Nightline

Picturesque public lands that used to host a few thousand visitors each year might now see that many in a single day in part because of geotagged social media posts. #Nightline #Grand Canyon #nationalparks #Crowds #Selfie #Travel WATCH NIGHTLINE EPISODES: ALSO AVAILABLE ON HULU:

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