Wander down the Royal Mile from Castle to Palace, climb Calton Hill for the panorama of the Old Town (for even better views climb the Nelson Monument, not free). Admire the 105 marbles of the Scotsman Steps between North Bridge and Market Street (for a list see page 9 of the September 2011 Newsletter). The quad of the monumental Old College (Robert Adam and William Playfair) is open to the public. On weekdays, the public may enter Old Parliament Hall (behind St Giles, free) and mingle with the lawyers while admiring the 1638 timber roof; you may even sit in on a trial (ask at the desk). Guided tours of the Scottish Parliament are free but must be booked in advance.