Where is woof in wally great picture hunt exhibit?

The "Woof in Wally" picture hunt exhibit is not a real thing. There is no official exhibit or book featuring a character called "Woof in Wally."

It's possible you're thinking of something else:

* "Where's Wally?" (or "Where's Waldo?" in the US): This is a popular series of books and exhibits that feature the character Wally hidden within busy scenes.

* "Woof" as a dog-related theme: Perhaps you're thinking of a dog-themed exhibit that might feature Wally in some way?

If you can provide more details about the exhibit you're thinking of, I might be able to give you a better answer!