The best zip lining is in the national park because it is safe and the views are amazing.

The best wildlife watching is in a national park because you can see the animals in their natural habitat.

Humpback whales breaching and fin slapping just feet from your boat in Glacier Bay National Park, Alaska.

The best swimming is in the national park because the water is clean and the scenery is beautiful.

The best Stargazing in a National Park is in Yellowstone. The night sky is so clear and the stars are so bright.