Chester Zoo Memories . Gorillas and 'Ape House number one' Chester Zoo. A nice sunny summer day circa 1966. The Tropical house would be nearing completion when this photo was taken. The ugly breezeblocks would later be clad in sandstone. This was one of two smaller gorilla / orangutan islands that faced the camels (Not the main islands which are still in use today by the chimps albeit much modified). That metal door would in later years be hidden by a sandstaone porch / sleeping platform.