10. Amsterdam, Netherlands
Photo: PHOTO: Rijksmuseum; Amsterdam, The Netherlands. (photo courtesy of dennisvdw/iStock Editorial/Getty Images Plus)
According to AAA, more than one-third of families who are planning a trip together this year will visit an international destination and many will wind up in Amsterdam, where the warmer months bring about countless festivals and add to the appeal of the city's parks, waterfront and outdoor entertainment.