{mosmap lightbox='1'|show='0'|txtlightbox='<img class="sobi2DetailsImage" alt="Yellowstone National Park" src="http://trekhappy.com/images/com_sobi2/clients/2_img.png"/>'}

The image should be correct html and not transformed by the editor to escaped html characters. So edit in html view and not in the editor itself.

Yellowstone National Park