Possibly my favourite boulder in the world, the big boulder near Druimdrishaig at Loch Caolisport on the Kilberry Road. One of the most photogenic boulders in the world I suspect. Most definitely worth a stop on a journey to/from Islay.
The Crinan Canal is a nice stop on the journey to (or from) Islay, here a nice view of lock 10 on a sunny June evening.
If you have the time and some decent weather on your drive to Islay taking a detour via the A817 between Loch Lomond and Gare Loch / Loch Long is well worth it. This view is on the western side, looking towards the Arrochar Alps. A biker is riding the other direction while my car is parked in a layby further down.