A National Geographic writer and his son wave from a cable car on France's Mont Blanc in a Kodachrome photograph published in the magazine in 1965.

The picture appears in the National Geographic exhibition "Kodachrome Culture: The American Tourist in Europe," which opened June 25 in the society's Washington, D.C., headquarters.

Kodachrome had its heyday in the 1950s in the magazine, which published brilliant European scenes and helped spark a new generation of U.S. tourists.