I learned this back in the 60's, from Paul Sykes.

Here is his version:

To a dance I did go, where the gowns were cut low
Held up only by a strap
There was one startling dress that intrigued me, I confess-
It was made out of a map

Her back was Brazil, her chest was Bunker Hill
And just a little bit below was Mexico
Her shoulder blades were Nipponese,
And on her bosom, there was Greece

Her waist was Siam, her hips were Hindustan
I'm not quite certain of her thighs
Because just then I saw my wife, and to avoid a lot of strife
I let the rest of the world go by.