St. James's Palace, London

This small royal palace is a current London residence for Prince Charles, and foreign ambassadors are officially received here. Henry VIII originally ordered its construction for Anne Boleyn in 1532, and it served as the monarch's London residence until Queen Victoria ascended to the throne in 1837. Because the palace is still in use by the Royal family, its not open to the public. However, both the Chapel Royal - scene of five royal weddings - and Queen's Chapel in Marlborough Road are open to visitors on Sundays. It's also worth turning up for the changing of the guard in Friary Court, which takes place daily at 11a.