We've silently launched Photofable. It's a social site aimed at promoting global culture exchange through photography and descriptions. Can be used as a travel tool as well. The focus is for each photos description to be informative or educational about the place it was taken.
feedback: those oblong shapes and the square images make your site ugly. Strongly suggest using a lot of golden ratio on everything. Really love your idea, I hope you stick to it.
http://www.photofable.com/destinations.php