Rothesay on the Isle of Bute is a fairly small castle, indeed it could be considered mostly a keep. A few round towers surround the central area though regrettably these are in a pretty poor state. Also, at least right now the majority of the northern wall is undergoing reconstruction and it’s quite difficult to position oneself for a good view.
Another problem: seagulls. There were about a dozen score million of them. And they were very much in the way of trying to walk around the castle…
The history of this place is interesting with a lot of 12th/13th century struggles happening here. The Norwegians had it, the Norwegians lost Rothesay and Bute; Scots built a castle here, and before they were finished the Norwegians came back and conquered it. Apparently the walls at that point were so fresh that the Norwegians could dismantle them. They took the castle, killed some Scots, but had to retreat a short while later. King Hakon Hakonson came back before the end of his life and he took the place again, but the Scottish fleet along with some helpful weather defeated him. Hakon died on his way back to Norway (on the Orkneys), and Rothesay was Scottish forevermore. Owned by the Stewarts, it became a royal castle when they took up the kingly spectre and such it is now.
However, even with all that history the emotion Rothesay brings up is not one of a bloody struggle or of massive power. It feels cute to me, in a way most other castles, large or small, do not. I’d recommend taking a look, but there are better places to see.