Motivated by the below chart of the age distribution of Olympic athletes, Junk Charts presents several techniques to [visualize multiple distributions]:

Age distribution of Olympic athletes

Candidates include the traditional boxplots used by statisticians as well variations and a stack of histograms. I think violin plots, suggested by a commenter, are a nice compromise showing the full distribution.

[visualize multiple distributions]: http://junkcharts.typepad.com/junk_charts/2016/08/various-ways-of-showing-distributions.html “Various ways of showing distributions”