Share the knowledge: Share on FacebookShare on Google+Pin on PinterestShare on RedditShare on TumblrTweet about this on TwitterEmail this to someoneShare on StumbleUpon

To make it easier to experience America’s Great Outdoors, the National Park Service is waiving entrance fees, so visitors can enjoy all 392 national parks for free April 17-25.

What a great way to spend the day getting some exercise and exploring with your family.