Diagon Alley
A simple 2 stage multi near Liberty Reservoir.
At stage 1 you will find a pill bottle containing a question from the Harry Potter book series.
Enter the answer in certitude to take you to the final stage which is a medium container.
Be sure to take note of the letter on the inside of the lid of the final container, it will be needed to find the final cache Hogwarts

You can validate your puzzle solution with certitude.
Diagon Alley is a cobblestoned wizarding alley and shopping area located in London, England behind a pub called the Leaky Cauldron. Inside the alley is an assortment of restaurants, shops, and other sights. All items on the Hogwarts supply list can be bought at Diagon Alley. The alley is completely hidden from the Muggle world which is right outside of its boundaries. It is very large in area and essentially the center of wizarding London. While the shops include many school-supply locations, there are also many locations important to the wizarding world, such as Gringotts Wizarding Bank, Eeylops Owl Emporium and Ollivanders. If a wizard or witch needs something, chances are that it can be found in Diagon Alley.
One entrance to Diagon Alley can be reached on foot by passing through the Leaky Cauldron (a wizarding pub/inn). The inn, which is invisible to Muggles, lies in between a bookshop and a music shop. To enter Diagon Alley, one must go through the Leaky Cauldron to a rear courtyard and tap a brick in the wall, found by counting three up and two across, three times. In the film, the tapping of five bricks around a hole in the wall opens the doorway to Diagon Alley. Given the busy nature of the area, travelling to and from Diagon Alley is likely typically done by more magical means such as Apparition or by using the Floo Network, which are both ways of wizarding transport. It contains shops that offer a wide range of magical supplies,
The name Diagon Alley is a near homophone of the word "diagonally", which is used as a plot device when Harry mispronounces the phrase near the beginning of the second book.
