In the late 1960s, Canadian Club hid 25 cases of their whiskey in remote locations around the world and launched a marketing campaign to encourage adventurous fans to seek them out. Over 50 years later, at least 8 remain undiscovered (or at least, unreported).
The cases were hidden in destinations like Mt. Kilimanjaro, Angel Falls, Death Valley, Tonga and more. Some of the undiscovered cases are believed to be in Lake Placid, Loch Ness, Yukon Territory and Robinson Caruso Island waiting for some enterprising (and very lucky) person to stumble upon them.
Perhaps best of all, they produced these incredible ads: