The Hunterian Art Gallery and The Mackintosh House are located just in front of The Hunterian Museum. The art gallery houses some significant art collections, including Rembrandt, Chardin, Stubbs, Whistler, Mackintosh, and Scottish Arts, especially the Glasgow Boys and Scottish Colourists.
Admission to the art gallery is free.
The Mackintosh House displays a strict reconstruction of the inner space of the house of Charles Rennie Mackintosh and his artist wife, Margaret Macdonald. They lived in the next street from 1906 to 1914. The rooms are furnished with Mackintosh's original furniture and decorated as close to the original as it can. Unfortunately, taking pictures is forbidden in the Mackintosh house, so you will have to trust me on this one - make a visit to the museum. It costs a few pounds, and maybe you will have to wait (because they only allowed 12 people in the tiny house simultaneously) - but it is worth it.