Britain's King Charles, centre left, and Queen Camilla leave after visiting the Canada House Trafalgar Square, in London, Tuesday, May 20, 2025 to mark 100 years since it opened in June 1925.

Buckingham Palace, King Charles III's London home, is open for touring (except for the king's private quarters, of course) from July to October. On the tour, you'll have access to the 19 State ...