In 2015 alone more than 300 million people visited the US national park system. Some stayed for a few hours, others for a few days – and, occasionally, some never make it out.
[youtube https://www.youtube.com/watch?v=wwJyc5tzXYg]
and check this out…
[youtube https://www.youtube.com/watch?v=4aNvHjpC3zA]
