I don't think there's any better place in the world to see art than London. I visited the National Gallery on July 23rd and the Tate Britain on the 24th before leaving the UK, and all saw all manner of stunning art -- all for free, as most museums in England are free to the public.
The National Gallery: so many Turners, and you know, a few Van Goghs sitting around.
The Tate Britain: even more Turners and a room full of Rothkos
Joseph Mallord Willam Turner (April 23, 1775 - December 19, 1851)
Self-portrait c. 1799
