Do people still use the old HTML Image Maps? The ones with:
Image Maps are still in HTML5 specifications, supported by all browsers.
They can be adapted to responsive design using jQuery RWD Image Maps: https://github.com/stowball/jQuery-rwdImageMaps
It detects and automatically resize the image maps coordinates.
It's also available for Wordpress developers as plugin: http://wordpress.org/plugins/responsive-image-maps/
Simple and effective solution.