Mental Floss has amazing facts, lists and quizzes to engage the brain.
For example: Thirteen houses with secret passageways: http://mentalfloss.com/article/51949/13-houses-secret-passageways
or Film of San Francisco after the 1906 earthquake: http://mentalfloss.com/article/51974/film-san-francisco-after-1906-earthquake
Mental Floss also has a website: http://mentalfloss.com/