30 Magical Secrets From Universal's Harry Potter Diagon Alley

3. Listen To The Wizarding Wireless Network

If you take a trip to the restrooms in Diagon Alley you can listen to some of the announcements from the Wizard Wireless Network, a favourite of Molly Weasley.

2. Celestine Warbeck

Admittedly Celestine Warbeck and the Banshees aren't quite a secret, but the titles of the songs in their repertoire were created by J.K Rowling. Catch Celestine and her backing group perform at the Carkitt Market around once an hour.