Not all of it, there is still a 'Pets Corner' and some buildings that were part of the old zoo (Bearing in mind it closed in 1977 and it was probably 1974 I last visited, age 6!) and the maze. Some pics here:
https://www.facebook.com/permalink.php?story_fbid=359427780774077&id=47236254126
Piper Alpha memorial is in Hazelhead now
It's perhaps more showing the mini-Theme park that followed the zoo at that site
Both Bing Maps and Google Maps satellite and aerial pics still show the basic layout, although it looks like some development is underway.
Thank you for that link, very interesting, it is one of those zoos you rarely hear much about.
I heard the other day that the original zoo gates to the old Cromer zoo are still there, though I don`t know what the site itself is like ?