Nearly every attraction in San Diego offers a senior discount; age requirements vary. Public transportation and movie theaters also have reduced rates. Don't be shy about asking for discounts, but always carry identification, such as a driver's license, that shows your date of birth.

Members of AARP, 601 E St. NW, Washington, DC 20049 (tel. 888/687-2277 or 202/434-3525; www.aarp.org), get discounts on hotels, airfares, and car rentals. AARP offers members a wide range of benefits, including AARP The Magazine and a monthly newsletter. Anyone over 50 can join.

The U.S. National Park Service offers an America the Beautiful -- National Parks and Federal Recreational Lands Pass -- Senior Pass (formerly the Golden Age Passport), which gives seniors 62 years or older lifetime entrance to all properties administered by the National Park Service -- national parks, monuments, historic sites, recreation areas, and national wildlife refuges -- for a one-time processing fee of $10. The pass must be purchased in person at any NPS facility that charges an entrance fee. Besides free entry, the America the Beautiful Senior Pass also offers a 50% discount on some federal-use fees charged for such facilities as camping, swimming, parking, boat launching, and tours. For more information, go to www.nps.gov/fees_passes.htm or call the United States Geological Survey (USGS), which issues the passes, at tel. 888/275-8747.

Road Scholar (formerly known as Elderhostel, tel. 800/454-5768; www.roadscholar.org) arranges worldwide study programs for all ages, but the core demographic is age 50 and above. ElderTreks (tel. 800/741-7956, 0808-234-1714 in the U.K., or 416/588-5000 anywhere else in the world; www.eldertreks.com) offers small-group tours to off-the-beaten-path or adventure-travel locations (including Baja); restricted to travelers 50 and older.

Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.