值得买推荐：
Free Entrance Days in the National ParksAmerica’s Best Idea – the national parks – gets even better with several fee-free days at more than 100 national parks that usually charge entrance fees.*Mark your calendar for these fee-free dates in 2012:
- January 14-16
Martin Luther King Jr. weekend - April 21-29
National Park Week - June 9
Get Outdoors Day - September 29
National Public Lands Day - November 10-12
Veterans Day weekend
To make the fun even more affordable, check out these discounts and special offers from park partners and neighboring businesses:
Here’s a tip – many of your 397 national parks NEVER charge an entrance fee. So start Planning Your Visit!
*Fee waiver includes: entrance fees, commercial tour fees, and transportation entrance fees. Other fees such as reservation, camping, tours, concession and fees collected by third parties are not included unless stated otherwise.
全部免门票公园如下，有计划的，请查阅相应免票日：
Free Entrance Days – Participating Parks (by state)