Book cover (paining)

Hello, I was wondering of you know the name of the painting/photograph on the cover of the 2004 Vintage Classics edition of this wonderful book. It's so beautiful

Here is a link (so there's no confusion ) http://www.randomhouse.co.uk/vintage/vintageclassics/title.htm?command =Search&db=/catalog/main.txt&eqisbndata=0099478331