National Gallery

Covering the north side of Trafalgar Square, London's National Gallery features a labyrinth interior so large that it requires a color-coded map to navigate. Here you'll see famed works, such as Botticelli's Venus and Mars and Seurat's Bathers at Asnières. Recent travelers praise the enormity of the collections, and advise scheduling more than one day to see it all. Art neophytes need not worry—recent reviewers say that the National Gallery offers an experience that goes beyond its vast collections. As one TripAdvisor user says, "For anyone vaguely interested in art or history, you must visit this gallery!" 

If you want a little more guidance you can sign up for free talks and tours, offered daily. And if you're worried about keeping the kids busy while you take in the collections, The National Gallery provides audio tours and maps designed especially for children. The National Gallery welcomes visitors daily from 10 a.m. to 6 p.m., and on Fridays until 9 p.m. Though admission to the permanent galleries is free, the museum does charge an entrance fee for special exhibitions. Check the museum's website for special exhibition prices. You'll find the museum off the Westminster tube stop.