National parks free during the last week of April
POSTED: Tuesday, March 20, 2012 - 3:30pm
UPDATED: Tuesday, March 20, 2012 - 3:34pm
NBC NATIONAL NEWS — If you're planning to visit a national park soon, you can do so for free the week of April 21 through April 29.
During that week, admission to all 397 national parks will be free.
Keep in mind that some parks are free to begin with.
The park service is also planning special events and activities that week.