Best Hogwarts Secret
Mine was an easy choice this week!
The Room of Requirement
From when it was first mentioned I fell in love with it. A room that appears when you require it? It sounds perfect! It cracked me up when it turned into a toilet for Dumbledore and contains so many amazing memories from then on for Dumbledore's Army. I loved everything about it. I loved that it appeared again in the battle of Hogwarts in Deathly Hallows, and above all, it's such a cool idea!
What's your favourite Hogwarts secret?