Use image map in a responsive environment. See cremationsnm.net for implementation.
JS (footer)
<script type="text/javascript" src="<?php echo get_template_directory_uri(); ?>/js/imageMapResizer.js"></script>
<script type="text/javascript">
jQuery(function($) {
$(document).ready(function() {
$('map').imageMapResize();
});
});
</script> 
