One of the coolest things about the gardens at Buckingham Palace is not the fact that it boasts a mulberry tree planted during the reign of King James I (although that is pretty awesome), but that it is the home of five bee hives on an island in the lake of the garden. These hives produce about 160 jars of honey a year which are then used in the royal kitchens.
Considering the effort that goes into curating the space then, it's no surprise that Buckingham Palace's gorgeous garden is the location of choice for Her Majesty's annual garden parties. Roughly 8,000 guests attend each event, and wind up consuming an average total of 27,000 cups of tea, 20,000 sandwiches and 20,000 slices of cake!