The Royal Palace of Caserta is the largest palace in the world. The gigantic structure lies 30km north of Naples and has 1200 rooms on five floors, spread across 762,000 square metres. The palace combines stunning architecture with mind-boggling engineering to create a truly unique building. Caserta was the main hub of the Bourbon-ruled Kingdom of Naples. Architect, Luigi Vanvitelli created Caserta for King Charles VII in 1752. To bring water to the palace from the Taburno Mountains over 40km away, Vanvitelli created the Caroline Aqueduct. At a gradient of just half a millimetre per metre, the water system it is a mathematical marvel.And, within the palace grounds is a silk factory that dates back to the 18th century and still functions to this day.