National parks to offer fee-free days this summer

The National Park Service will offer three admission-free weekends this summer to encourage Americans seeking affordable vacations to visit the national treasures.

The 147 National Park Service sites across the country that charge entry fees will waive costs June 5 and 6, Aug. 14 and 15, Sept. 25 and Nov. 11.

The entrance stations will be staffed to provide maps, information and to sell annual park passes. The waiver, however, does not include other fees, such as camping. As these weekends may be extra busy with traffic and parking congestion, visitors are encouraged to ride the park's free shuttles.