From the Mixed Up Files of Mrs. Basil E. Frankweiler

Claudia knew that she could never pull off the old-fashioned kind of
running away. That is, running away in the heat of anger with a knapsack
on her back. She didn’t like discomfort; even picnics were untidy and
inconvenient: all those insects and the sun melting the icing on the
cupcakes. Therefore, she decided that her leaving home would not be just
running from somewhere but would be running to somewhere. To a large
place, a comfortable place, an indoor place, and preferably a beautiful
place. And that’s why she decided upon the Metropolitan Museum of Art in
New York City.