The Ravenclaw common room is located in Ravenclaw Tower. The door going inside has an eagle-head knocker that gives you a riddle. Answer it correctly and you gain access. Answer incorrectly, and you have to wait for another student to get it right. The answer to this riddle is 'The word wholesome'
J.K. Rowling for making this amazing series. Google/The Internet for the photos @Goddessfoox (ME)
