Architect Charles Rennie Mackintosh's global reputation rests in large part on this magnificent building on Garnethill above Sauchiehall Street, a highlight of the Mackintosh trail that legions of his fans from across the world follow through the city. Completed in two stages (1899 and 1909), the building offers a mix of ideas promoted by the Arts and Crafts and Art Nouveau movements. Given its quality, what's more amazing is that Mackintosh was not yet 30 when he designed the place. It is still a working - and much respected - school, whose graduates continue to make their mark in the international art world. Guided tours are the only way to see the entire building, a highlight of which has to be the library. The airy landing one flight up serves as the school's exhibition space: The Mackintosh Gallery, while the basement has a new, well-stocked shop.