Retirement Travel: See the World with the Grandkids

Jennifer Girvin, 69, of Santa Rosa, Cal., loves to travel, which she often did with her late husband. Although she still takes trips with her friends, these days her travel companions are likely to be much younger--namely her grandchildren. Last summer, she took Dahlia, now 16, to Costa Rica for two weeks. "We zip-lined, we hiked to a waterfall, we went snorkeling, and Dahlia took surfing lessons in the ocean. Who wouldn't love that?" says Girvin. She's planning two trips this summer: one to Florida with a 10-year-old grandson and another to the Grand Canyon region with a 13-year-old grandson.

For a growing number of grandparents, multigenerational travel--especially trips