Sally Law interviews Tony Hiss on his book In Motion: The Experience of Travel:

No place, however well we know it, stays exactly the same from day to day, or even from hour to hourthere are always different combinations of people present, or different plays of light and shadow. The most famous examples of this are the more than thirty canvases Monet painted of the facade of Rouen cathedral in the eighteen-nineties. Same church, even the same viewpointhe had rented a room across the street. But each one astonishingly different; sometimes the church looks brooding, ancient, gray-brown, cavernous, almost collapsing on itself. Other times it looks robust, sparkling, brand new, almost too brightly white to look at head-on.