Take a stroll in the Oak Bay Village and visit a cultural institution. Go to the posted coordinates and complete the field puzzle.
You should be standing near a large metal object. Now to get the clue for the final stage use a set of numbers listed on the object
Heres the puzzle: first number minus one, second number plus one, third number minus one, decimal, fifth number, fourth number. GEO.
Please be quiet and watch out for muggles! Cache is available from 10 to 6, Mon to Wed and Sat, and 10 to 9, by Thurs and Fri.