Ok Anna/Аня , but he is not looking to connect a map or google map to his code.
He wants to do an imagemap. A HTML imagemap where you turn any picture into a clickable map to load pages or do whatever.
Nothing to do with iframes.
In html you can simply use iframe tag for displaying maps
Mappa.js is very popular these days
(Name is not confirm that it is mappa.js or something else😅)