The Google Art project is a terrific way to look closely at paintings etc that you would normally have to travel miles to visit in person. The above link takes you to some well known works on display in Scotland. My personal favourites are the works of the Scottish Colourists Peploe and Cadell. Not all the works on display in the actual museums are included in the link of course but it gives a flavour of what is out there if you are lucky enough to get to visit the galleries in person.