If you are near a National Park there are some free days coming up.
You can go here and get the information on the free days this Saturday, September 24th as well as Veterans Day Weekend, November 11th-13th.
If you want to check a park in your area, you can go here to see the parks listed by state.
So get out and enjoy a National Treasure for FREE!
If you are looking for a volunteer opportunity and love the great outdoors, September 24th also happens to be National Public Lands Day. You can go here and click on your state and find more information on coordinated events near you.