Windsor Castle is an official residence of The Queen and the largest occupied castle in the world. A royal palace and fortress for over 900 years, the Castle remains a working palace today. Visitors can walk around the State Apartments, extensive suites of rooms at the heart of the working palace; for part of the year visitors can also see the Semi State rooms, which are some of the most splendid interiors in the castle. They are furnished with treasures from the Royal Collection including paintings by Holbein, Rubens, Van Dyck and Lawrence, fine tapestries and porcelain, sculpture and armour.

Within the Castle complex there are many additional attractions. In the Drawings Gallery regular exhibitions of treasures from the Royal Library are mounted. Another popular feature is the Queen Mary's Dolls' House, a miniature mansion built to perfection. The fourteenth-century St. George's Chapel is the burial place of ten sovereigns, home of the Order of the Garter, and setting for many royal weddings. Nearby on the Windsor Estate is Frogmore House, an attractive country residence with strong associations to three queens - Queen Charlotte, Queen Victoria and Queen Mary.