Was the inspiration for Harry Potter's Hogwarts, Quinta da Regaleira? An exuberant Palace built between 1900 and 1910 by Antonio Augusto de Carvalho to the designs of the Italian architect Luigi Manini. The neo-manueline design weaves a story of mythology, alchemy and magic. Tucked away in the Sintra hills above Lisbon, the link to the moon goddess is supposedly strong. Unpack Regaleira and you are left with gaia.