4. NATIONAL GALLERY
Set in London’s busiest open space, Trafalgar Square, this is the
grandmother of galleries with more than 2,300 paintings spanning the 13th
to the 19th centuries (Heavyweights include Van
Gogh’s Sunflowers, Velequez’s Rokeby Venus, and Constable’s six-foot
long The Hay Wain). It gets packed at weekends, but its so large that you
can usually find a quiet corner. Download one of the myriad audio tour
options and explore. You can download an audio tour covering the
museum's highlights, but you can also curate your own by selecting the
paintings you want to see before you arrive