If I embed a google map in a page it looks like the theme is wrapping it in fluid-width-video-wrapper and the map expands to be as large as the page and does not respect the iframe size settings. See the page below
http://decaturfarmersmarket.com/wordpress/?page_id=772
This is a side-effect of the responsive layout. I don’t have an efficient solution for this. If you don’t use videos or embedded media you can delete tis line in functions.php:
$(".entry-attachment, .entry-content").fitVids({ customSelector: "iframe, object, embed"});
Alternatively you can use a different page template to make the content width narrower.