The inside of the castle is a series of museums. Perhaps the most telling of all is the Prisoner of War Museum
From the Castle, we took the tour bus over to Holyrood Palace. The palace is only open when no members of the royal family are in residence. It is the older, historic suites that are open to the public, not the private residence. In spite of that, no photography is permitted inside.
The remains of the old abbey are still on the grounds