Paul Mison: It's not as famous as its generalist neighbour, but it's well worth a visit in its own right. Keep an eye out for temporary exhibitions, too, although not all of them are worth the money.
Art Museum · Kensington and Chelsea · 648 tips and reviews
Paul Mison: When I was a kid I preferred the Natural History and Science museums, but now the art, design, and architecture in this museum proves more diverting. A must see.