Nothing can restore a temple that stood for thousands of years once it's destroyed, but the website ReclaimHistory.org launched on April 29, and it's powered by UNESCO’s #Unite4Heritage, Rekrei, and agency Ogilvy New York, to at least capture the heritage of these sites in a digital form.
http://www.fastcocreate.com/3059431/how-unesco-is-crowdsourcing-the-preservation-of-world-heritage