Buckingham Palace and Windsor Castle Day Trip from London. Visit two of England's grandest royal residences on this day trip to Windsor Castle and Buckingham Palace. Traveling from London by air-conditioned coach, head for Windsor Castle in Windsor. Be one of the first of the morning to witness the State Apartments and St George’s Chapel, and, depending on the day, the Changing of the Guard. Then, pass Runnymede, where the Magna Carta was signed in 1205, and enjoy an audio-guided tour of the magnificent State Rooms and treasures of Buckingham Palace, Her Majesty Queen Elizabeth II’s main London residence. Book this Tour and Save 10%! Buckingham Palace and Windsor Castle Day Trip from London.