The National Park Service will waive entrance fees on Aug. 14-15.

"This fee-free weekend provides an opportunity for individuals and families alike to take an affordable vacation or to explore a nearby park they have never visited before," Secretary of the Interior Ken Salazar said. "I encourage everyone to take advantage of the free admission to visit not only our greatest natural wonders but also our nation’s historic and cultural icons."

There are 392 national parks located across the country in 49 states, many of which will hold free events on August 14 and 15. A complete list by park or state is available at www.nps.gov

Michigan has five national parks: Isle Royale National Park, Keweenaw National Historic Park, Sleeping Bear Dunes and Pictured Rocks National Lakeshore and the North Country Scenic Trail.