Nav:

Inveraray Castle: The main attraction in town. Built in the 1700s as the home of the Duke of Argyle and Chief of Clan Campbell. A paid admission includes a guided tour of the part museum / part home. The noble family sequesters to a portion of the home when tours operate. The home is closed to the public in the entirety for a portion of the season, allowing the family to use the full home.

Town of Inveraray: It isn't large by any means but it's beautiful and east to walk.

Nosh:

The George Hotel: One of the larger venues on the main drag through Inveraray (again, not much to it so it's easy to get to).

Savory steak pie with mashers and veg.
Ham and cheese toastie with vegetable soup.

Nip:

Grab a pint with lunch!