This is a hidden gem in Macau where normal tourists won't easily find it on their tourist books.
The cache is not difficult to find. At GZ, you can find some characteiristic shipyards which are still doing their business. It's a part of Macau's history and culture other than casinos.
Please do not try to enter one of them to avoid disturbance. Instead you may have a look at their signs and take some pictures through their entrance with beautiful water view.
After the grab, you may rest at a local cafe built inside an abandoned shipyard nearby to have some refreshments. You will not regret tasting the iced coffee and sandwitches there! From openrice, it opens 07:00 - 18:00 and closes on Wed.
Please be stealth from muggles and dogs when you are in action.
Stories about Macau's Shipyards(Chinese only)
Interview of the cafe's master