Starting tomorrow, Saturday April 17th, the National Park Service will be offering FREE entrance to ALL National Parks in the country thru Sunday April 25th! They really want to encourage people to go out & enjoy all 392 National Parks in the US. Many parks will also be offering organized events, talks, volunteer clean-ups & other projects to encourage people to visit this week. Earth Day is on Thursday April 22nd this year and it's a perfect day to get out and enjoy the beautiful world we live in.
You can find a national park to visit on their website: http://www.nps.gov/npweek/ :)