Google's Art Project

Aiming to open the world’s art collections to online viewers, Google today unveiled the Google Art Project, a website that allows visitors to see more than 1,000 works by 486 artists, take virtual 360-degree tours of galleries, and zoom in for extreme close-up views to inspect a great artist’s brushwork.

There are some great museums on the list, and the level of detail that you can see in the paintings is amazing.

http://www.googleartproject.com/