If you love the outdoors, and plan on traveling a lot, getting a senior pass to United States National Parks is one of the best deals out there. For $20, if you are 62 or older, you get lifetime access to all the national parks, which is almost what you would pay at full price for admission to some of them. The card never expires as long as you own it, but you must get one for each perosn. This includes parks managed by the National Park service, National Fish and Wildlife service, and the Army Corp of Engineers. Any federally managed site is included. This includes admission only. If you are camping you may also get an AARP discount for your campsite. Some historical sites are also covered with the National Parks pass.