Free for all: National Parks Week ends Sunday Dalibor Letnic, Paula Letnic and their children Antonia, 8, and Jose Tomas, 16, were battling the high winds while climbing on the rocks at Virginia's Great Falls Park Overlook 1. Tracy A. Woodward/The Washington Post One of the many perks of living in the Washington area is our access to many entrance fee-free National Parks. But this weekend we get a special treat: the handful of the parks that do charge admission are open for free as part of the last days of National Park Week. Plus it looks like the weather is going to cooperate for at least part of the weekend. You can find a complete list of participating parks here, but we thought we'd help you out and pick four that we are excited to visit:: Assateague Island National Seashore Where else can you see wild ponies, dip your toes into the Atlantic Ocean and camp on the beach? Fort Washington Park In a city of free National Parks, Fort Washington is easy to overlook, but if you were ever curious about the mammoth structure on the shores of the Potomac River, now is the time to visit. In addition to the lovely views of the river and historic interest, you might also want to check out the lighthouse. George Washington Memorial Parkway's Great Falls Park What can Marylanders and Virginians agree on? Great Falls Park, with its rocky rapids, is the most spectacular places to see the Potomac River. Which shore offers the best views? Well, that is still open to debate. Shenandoah National Park We'd be remiss if we didn't include this one on our list of must-visit parks. With miles of trails and magnificent mountain views, the park is popular for good reason. Need a view of the outdoors at your desk to get you through the rest of Friday? Check out our garden photo gallery.