The National Park Service turns 100 in August, and parks across the country are hosting centennial festivities. Although not every state has a national park, the agency also oversees national monuments, national historic sites, and national rivers, among other areas. This list highlights 50 must-see destinations -- the best the country has to offer.
National parks often charge an entrance fee that grants seven days of access and costs up to $30 a vehicle. An interagency annual pass provides access to all the national parks and other federal fee areas for $80, or just $10 for residents 62 or older (free for permanently disabled residents, volunteers with 250 hours of service, and U.S. military personnel and their dependents). Fee-free days also are offered throughout the year, including Aug. 25 to 28 to commemorate the Park Service centennial.
Related:13 Money-Saving Tips for Visiting U.S. National Parks