Whitechapel Galley in East London is the perfect place to do just that. Pop into the Hannah Höch exhibition. Hannah Höch combines different images and the exhibition is made up of 100 of her works.
See more here: http://www.whitechapelgallery.org/exhibitions/hannah-hch
Afterwards fuel up in the café on a delicious soup served with a cheese and chive scone.
Then enjoy a hearty portion of cake.