America the Beautiful Interagency Annual Pass (www.nps.gov/findapark/passes.htm; store.usgs.gov/pass) This $80 pass admits the driver and all passengers in a single, non-commercial vehicle, or four adults aged 16 or older to all national parks and federal recreational lands (eg USFS, BLM) for one year. Children aged 15 and younger are admitted free. The pass can be purchased online or at any national park entrance station. US citizens and permanent residents 62 years and older are eligible for a lifetime Senior Pass ($10), which grants free entry and 50% off some recreational-use fees like camping, as does the lifetime Access Pass (free to US citizens or permanent residents with a permanent disability). These passes are available in person or by mail. A free annual US Military Pass for current members of the US armed forces and their dependents is available at recreation sites with Common Access card or Military ID (Form 1173).
American Association of Retired Persons (www.aarp.org) This advocacy group for Americans 50 years and older offers member discounts on hotels (usually 10%), car rentals and more. People over the age of 65 (sometimes 55, 60 or 62) often qualify for the same discounts as students; any ID showing your birth date should suffice as proof of age.
American Automobile Association (www.aaa.com) Members of AAA and its foreign affiliates (eg CAA, AA) qualify for small discounts on Amtrak trains, car rentals, motels and hotels (usually 5% to 15%), chain restaurants, shopping, tours and theme parks.
International Student Identity Card (www.isic.org; $26) Offers savings on airline fares, travel insurance and local attractions for full-time students. For nonstudents under 31 years of age, an International Youth Travel Card ($26) grants similar benefits. Cards are issued by student unions, hosteling organizations and travel agencies.
Student Advantage Card (www.studentadvantage.com) For international and US students, this card offers 10% savings on Amtrak and 20% on Greyhound, plus discounts at some chain shops and car rentals.