The main residence of Queen Elisabeth II as well as the administrative residence, where she spends most of her time, is Buckingham Palace in London. A famous and very spectacular ceremony - change of the guard - takes place there and attracts many people.Twice a year - in April and June - the Queen visits the Windsor Castle, the biggest castle in the world and the queen\'s favorite residence.When the Queen is in one of her residences, the flag is raised over the building so that everyone knows that the Queen is in that exact place at the moment.