There are several easter eggs, pointing to mostly fruit in the entire game. In one occasion there is a time where you can find a giant apple in the London tower. Even in the Zepplin after starting, turn around and go back to find a door half open, inside is a giant banana.
It is currently unknown why there is fruit, and if there is more to be located. It has been located that there is just more than fruit. But giant beer is located on top the roofs in the beginning.