http://www.topinfopost.com/2014/11/13/13-mysterious-things-that-cannot-be-explained
http://canyouactually.com/12-of-the-worlds-most-mysterious-photos-that-cannot-be-explained-or-can-they/
http://www.news.com.au/technology/science/ten-of-the-best-internet-photos-that-have-driven-us-nuts/news-story/7a5390a5b31f96e05287f9c7b19a7c66